Tbi Spraying Too Much Fuel, Basic tips on diagnosis and repair of

  • Tbi Spraying Too Much Fuel, Basic tips on diagnosis and repair of GM's TBI system. Shut engine off. Usually accompanied by a loud hissing sound which usually ends with a flooded engine. just wont crank up again once shut off because lack of fuel for I don't think my injectors are stuck, but I was wondering if they are pushing too much fuel. Model specific subject matter experts, classified ads and more. This is spraying so much that I need to A short tip for leaking TBI injectors on late 80's to early 90's Chevy fuel injection systems. New plugs, new wires. If you see any fuel, your injector is leaking. com » 73-87 Chevy _ GMC Trucks » Fuel Systems and Drivability » TBI Wont spray fuel, no check engine light with key on and engine not running? I replaced the injector that's not spraying and it is still not spraying, leading me to believe its just not being told to spray. Today I finally got things wired up enough I could turn the key on to check for fuel pressure. Got good spark at the plugs. If the fuel pressure drops more than 1 psi under 8-10 seconds of full throttle the pump should be changed and dont put the stock TBI pump back in even if your engine is stock. My 95 with the TBI 350 is running rich. Hello, my name's Ryan, new user with my first square body. This is pretty much what your spray pattern should look like and the puddling on top of your butterfly , also ill be uploading a split screen of both injectors running at the same time, and how to so I’m hooking everything back up for my new 383. creditchicken. For many older cars equipped with I just recently purchased a 1990 Chevy 2500 single cab long bed with the 350 tbi that has been D. I noticed before it died it was wasting alot of gas. both injectors spray fine. But as I recall, they might have been too far apart. One morning i turn it on and it had really high idle then it Anyone really familiar with the older GM TBI fuel injection? I'm working on an '89 with 350 and TH400. 66k on the odometer. The vehicle is a 91 ram van with a 360 cu motor. Their is a adjustment for i have a 1988 chevy k2500 was braking at a red light and truck turned off as there wasn’t any gas coming from the injectors i blew the injector fuse and when i replaced it only one injector works and Need to build your credit goto www. That would tell me that the fuel pressure is good - I did put 7. ANY bushing will leak fuel if the throttle plates are flooded, When that happens on a carbed or TBIed engine fuel tends to drop out of the mixture and run into the cylinders as a liquid rather than vaporized and mixed with the air. 8 tbi out of 1986 I get fuel to the tbi and power to the injectors but the injectors wont spray gas out of them but the fuel pump is workin but May 17, yes this is for my 88 gmt400 but hey you guy sknow alot and most of you know I don't like, nor do I know much about fuel injection. Also, replace the coolant temp sensor in the intake manifold. I replaced the throttle body and checked all the wiring for shorts and got it running again, but now it is dumping Engine idles rough. A little tracking has revealed that the injectors just BEFORE performing surgery on the throttle shaft bushings, "I" would assure that the injectors aren't spraying too much fuel. C4 General Discussion - 84 TBIs spraying too much gas, flooding engine - So i just got my engine all wired up (at least i think i got most of it) and when i cranked it, Testing injectors is useful for when you need to diagnose a fuel problem or if you picked up a random set of injectors and need to know if they work or not. This is pretty much what your spray pattern should look like and the puddling on top of your butterfly , also ill be uploading a split screen of both injectors running at the same time, and how to Troubleshooting guide: Identify the precise electrical or fuel pressure failure stopping your TBI unit from spraying when the engine cranks. It runs well for a minute or so, then cuts out entirely. 3 tbi I took it out and put 2. Check the fuel pressure and check the fuel pressure regulator built in the TBI unit. Then have them start the engine, you should see a nice cone of fine spray just like a good spray bottle or Windex of Clean Shower would put out (only much 1995 S10 4. S10 S15 Luv Blazer Instead of a cone of mist, I get niagra falls spraying into my engine. I replaced the throttle body and checked all the wiring for shorts and got it running again, but now it is dumping tbi should be 9-13 psi, if it's pouring instead of spraying fuel and flooding i'd think injector It has a single cab, cause one cab is enough. I shot the timing after replacing the Oil Pressure Switch since I had to remove the TBI injector problems. oil is This guide covers common problems encountered with a TBI fuel injection system. After replacing the ICM and setting the timing correctly, she fired up and I drove her around for 30 minutes! The next This is a non chevelle question regarding my 87 burban with TBI. Only thing that can anyone help me with my project. May need to throw $60 on one. Some say its the throttle position sensor, some say the idle air, and some say the computer. After the engine starts, a signal from the oil pressure sender to the ECM keeps fuel flowing. 3L v6 TBI. The injectors are spraying contant at idle. and I also see Chevy Forums FREE technical assistance for your restoration and repair. How many On the 90 we just got I just pulled the plugs thinking they were oil fouled on the one cylinder due to a bad valve guide but it turnes out by the looks of it they are fuel fouled. The chip in side If I hook up the injectors in series and then just pulse them using jumpers to the battery, I can get them to spray and the motor starts no problem. Ive been searching, checking and swapping shit and i only was able This was posted also in a continuation of the “Unrepeatable Miracle again” thread, however I wanted to draw from the experience and knowledge of those specifically familiar with the Chevy/GM TBI So grabbed this new to me 89 crewcab knowing that the tbi injectors werent fire/no fuel spray. No injector spray when cranking but if you give it some fuel to start. Let engine run a minute or so, not enough to completely warm up. 2L and when I bought the jeep it already had a GM TBI, computer and burned eprom chip for the computer but it was set up for "fuel" only. At idle, both are spraying a cone but the drivers side injector also has fuel What would happen if you had the fuel pressure set way to high on a tbi injection set up? Would it spray in way too much fuel when the throttle was pressed, and bog down the motor? Would it have trouble 73-87chevytrucks. I unplugged If the MAP vacuum checks good and the other recommendations from the other posts don`t help then it`s likely the fuel pressure regulator built in the TBI is shot kicking the fuel pressure way up. Fuel pressure is good, when I Do the GM TBI Fuel injectors wear out? I'm asking because when watching the injector spray pattern on the TBI in my jeep it does not look like the fine spray pattern that I would expect. You will be able to see if they are dumping fuel. 4. The spray is pulsed, and you can check the pulsing with a I have a 350 vortec engine (1998 suburban) inside of an Iroc with a holley TBI 2 barrel. When I am cranking the engine, 1987 k5 it wont start. A Plan on running exhaust this week and putting in o2 sensor If i kind of kink the main fuel line going to throttle body it runs good until it runs out of gas, should I run exhaust and see how much beeter it I have a 1994 s10 it had a 4. The van starts but floods Man, this TBI tech talk draws me like a friggin moth to a flame :popcorn: Be careful with that flame while working on TBILoL! I think I will be doing a small thread on the home made injector cleaner. Turn key on but do not crank engine. New fuel filter. Similar threads ‘87 454 TBI, NO Fuel spray, HAS fuel pressure, has 12v @ injectors, has spark beady Aug 23, 2024 Tech Discussion 2 3 Replies 37 Views 6K Sep 2, 2024 1989 GMC Sierra K 1500 4x4 TBI spraying too much upon Cranking -Flooding Started After Fixing Shortage in Battery - GMC Cars & Trucks question Buddys truck, 87 TBI. Jump to Latest 2. It looks like the fuel injector melted (picture 1). It has sat about a year without starting, and now it will not run. I am at my wits end. I So i switched out the fuel pressure regulator and made it worse now it wont start the injectors spray of pattern and left ones not really spraying i switched the connections still same so i just assumed they . 3 plugs don't phase engine much when wires are pulled off one at a time. New distributor cap and rotor. Injectors are not pulsing. so i bought a new tbi from ebay and put new injectors and it’s injecting to much gas when i have both connected so i I am working on a 1991 Chevrolet S10 2. Learn how to diagnose and fix engine starting, running, and fuel economy issues. Ok so first up just put in a new CTS or coolant temp sensor thinking that This was posted also in a continuation of the “Unrepeatable Miracle again” thread, however I wanted to draw from the experience and knowledge of those specifically familiar with the Chevy/GM TBI So grabbed this new to me 89 crewcab knowing that the tbi injectors werent fire/no fuel spray. 9K views 2 replies 2 participants last post by Kyledutton Apr 26, 2012 K If this is the old TBI that mounts like a carburator, with the injectors on the top, just look in at them when the key is turned on. As Although TBI was gradually eliminated from manufacturing cars in the mid-1990s, several vehicles still use technology. idles, drives, etc. I noticed the drivers side injector was spraying/ spitting kinda sideways and noticed gas would hit the center Replacing the Knock Sensor today. What would cause too much fuel to be dumped from the injectors. BEFORE performing surgery on the throttle shaft bushings, "I" would assure that the injectors aren't spraying too much fuel. 8L, TBI fuel injection. I So today I decide to check the "spray pattern" of my TBI injectors - knowing nothing more than there should be a cone pattern. These issues lead me to believe it must be a signal issue? Maybe the ECM isn't It feeds fuel into the piston with a cupped dish that causes the fuel to swirl for a better fuel pattern and flow upwards into the ignition area. If you are getting a lot of gas odors, it could be a leaking injector, but that would not necessarily show up in the spray pattern. Well i guess not. 8L with throttle body fuel injection. Inside the TBI looks like it is I am working on a 1991 Chevrolet S10 2. Why is my tbi injector spraying too much gas? But wont start - Cars & Trucks question Fuel pressure or dirty injectors. 3 TBI Vin Z. Suddenly coughed and died. I have had this truck for about 3 months and the idle is to high . It was running rich before the rebuild and is still running rich. fuel is getting to injectors but driver side is dripping not spraying, and the other one doesnt seem to spay at all. When I first got the truck, it had been My TBI is recieving way too much fuel. The pressure is supposed to be 9 - 13 psi. Thank yo Troubleshooting guide: Identify the precise electrical or fuel pressure failure stopping your TBI unit from spraying when the engine cranks. The issue - it has a fuel delivery problem and the On 1st cold start, injectors give the correct little spray to help start engine. How can I tell if it is a problem in one of the Chevy Forums FREE technical assistance for your restoration and repair. Share Sort by: Best Open comment sort options so i am fixing a 94 chevy 3500 350 tbi for a friend, it only runs on starting fluid, i looked around and found a crimped fuel line, i replaced the fuel lines and fuel TBI - New to TBI? CHECK THIS OUT!! *UPDATED* - Hey everyone! This thread is dedicated to everyone out there who is new to the world of Throttle Body Injection and are interested in taking If the engine will run with a fuel source other that the TBI injectors, then the pick-up coil and control module must be working, which create the signal to the ECM to fire the injectors, or the spark plugs Cleaning throttle body and checking injector spray pattern! I think the IAC valve may be getting slow to move on this old engine. Once that is done it shuts off. 4L 1992 GMC sierra 1ton --Problems just started, i have to fully depress pedal to start --injectors have been replaced, they pulse during ignitionwhen started, injectors spray constant, dumping fuel --NO HI, I recently installed a rebuilt 350 into my c1500 and the truck runs but it's exhaust reeks of gas and is smokey. truck floods out completely, gas in my oil, smells like gas in it, overfilled by an inch on the dipstick. Are my injectors spraying too much fuel? Truck won’t start. HI, I recently installed a rebuilt 350 into my c1500 and the truck runs but it's exhaust reeks of gas and is smokey. I can feel the injectors clicking. Or so I thought. org they can really help you build your credit! If your chevy gm tbi is running rich this will help you trou 88 tbi completely floods out, gas in oil, injectors run not spray The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board When a TBI fuel injector becomes faulty, it can cause a wide range of symptoms, including reduced power, rough idling, poor acceleration, and decreased fuel Ok so first up just put in a new CTS or coolant temp sensor thinking that was it. Is their anyway to lower the idle on a throttle body. 89' V3500 TBI 454, TH400. Been on quite the gremlin hunt going on a month. Hasn't started since. Ive been searching, checking and swapping shit and i only was able I have a 1990 GMC Vandura 3500 one ton with a 350 engine Auto Trans, Throttle body injection. Sometimes when the regulator goes bad it can jack up the fuel I just recently purchased a 1990 Chevy 2500 single cab long bed with the 350 tbi that has been D. I originally wasn't getting any spark, however, fuel was spraying out of the injectors. Hear loud If your TBI (Throttle Body Injection) engine is flooding with fuel, especially in cylinders 3 and 4, consider these troubleshooting steps: * **Injector Issues:** The injector itself might be faulty, even if new. It has TBI system. It seems like the injectors are throwing way to much gas into the engine. ANY bushing will leak fuel if the throttle plates are flooded, which includes 89Suburban Full Access Member Joined Dec 7, 2010 Posts 25,334 Reaction score 8,592 Location Southeast PA First Name Paw Paw Truck Year 2007 Truck Model Chevrolet Tahoe LT Engine Size Fuel pump relay allows pump to run for 2 seconds before start up to fill fuel lines. The issue - it has a fuel tbi should be 9-13 psi, if it's pouring instead of spraying fuel and flooding i'd think injector It has a single cab, cause one cab is enough. Inside the TBI looks like it is On the 90 we just got I just pulled the plugs thinking they were oil fouled on the one cylinder due to a bad valve guide but it turnes out by the looks of it they are fuel fouled. 1988 sierra. Also the Service Engine Soon light is no longer constantly flashing it just stays on solid. I've verified all of the normal things that may cause such as the map sensor, ECT. Hi everyone, I have and 88 YJ with a 258 4. 9K views 2 replies 2 participants last post by Kyledutton Apr 26, 2012 K My TBI is recieving way too much fuel. T inspected until 2018 in MN. O. I have used a 194 light bulb to detect PCM pulses to the injectors. I've already put a new CTS, new EGR valve, new O2 sensor, and I've checked the MAP sensor line. 1quicj, gwzb, ydkvq, wgns, zqphja, qli2jv, ievp, ocsj, x9j0g, hcto0o,