TBI Will Not Idle - Dies Out - Runs With Throttle
03-25-2008, 01:03 PM
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TBI Will Not Idle - Dies Out - Runs With Throttle
This is an engine I have on a home made stand I am trying to get ready to swap into a vehicle. I have heard this engine run and it runs good. I got an AFI basic harness and chip for my 1227747 ECM and installed everything. Engine fired right up but will only run for 15-30 seconds and then dies out. As long as I give it throttle OR spray starting fluid into the TB it will continue to run. When I stop the engine dies out in a few seconds. At some point I started to get a flashing check engine light. Had a friend come over with burning apparatus, he couldn't read the AFI chip so he burned a stock chip which gave a good check engine light and started the engine but still died out. Installed an inline fuel pressure gauge, getting 8-10 psi and the injector pattern seems to be good, fine mist in a cone pattern. Swapped over to the stock harness with all sensors hooked up except ERG and continue to have the same problem. Will run as long as I soot starting fluid into the TB. Anyone have any ideas what may be wrong? Thanks in advance.
04-03-2008, 08:40 AM
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Car: 88Fbird,88Formula,04 GP,04 Durango
Engine: LO3,L98,3800,HEMI
Transmission: 700r4, 4l60e, 545rfe
Re: TBI Will Not Idle - Dies Out - Runs With Throttle
Do a search on how to retrieve codes. All you need is a paper clip. Welcome to TGO and good luck.
04-03-2008, 09:45 AM
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Car: 1992 RS 6spd
Engine: Carbed 357c.i.
Transmission: Built T56
Axle/Gears: Soon to be Strange S60
Re: TBI Will Not Idle - Dies Out - Runs With Throttle
Are both TBI injectors spraying or just the primary when you start it.
01-09-2009, 04:46 PM
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Car: 1988 Pontiac Firebird
Engine: 5.0 TBI
Transmission: W/C T5
Axle/Gears: 3.08 Posi
Re: TBI Will Not Idle - Dies Out - Runs With Throttle
Sounds like it could be a bad pump.
01-09-2009, 05:39 PM
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Car: 91 camaro rs
Engine: 305
Transmission: 700r4
Axle/Gears: 2.73
Re: TBI Will Not Idle - Dies Out - Runs With Throttle
are you useing a map sensor set up or a mass air flow ? without it being hooked up it would cut off the fuel supply and I see your useing a homemade stand. just my 2 cents
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