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LT1 help needed...again

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Old 07-14-2009, 08:29 PM   #1
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Default LT1 help needed...again

car is a 96 camaro.

Ok so the newest of my damn lt1 gremlins. Last week driving home on highway engine dies. Throws a check guage on dash but no service engine light.Pull it into shoulder cranks right up.Drive to work next day flawless, on way home again engine dies. Cranks right back up. So this weekend went ahead and tried trouble shoot. Car throwing/stored no codes.Changed fuel filter,took off and cleand entire throttle body (tps,iac). Checked my connections, threw some techron cleaner in that ho. And let it idle no exageration over an hour. Idles perfect.... Drive to work monday fine.. Coming home hit the light, thing dies again only to crank right up. No hard start, no sputter or anything. When its died my lights/radio/guages on and stay on dont even dim, just engine dies. There is no warning.And its not throwing any codes, just says check guages until restart. ***** driving me crazy, only thing I can possibly think is maybe something to do with elec water pump/relay being its running off my ignition fuse perhaps? All my fuses fine though, and again no other symptoms, running perfect aside from random engine kill. ANY input greatly appreciated
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Old 07-20-2009, 03:01 PM   #2
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OK So this weekend removed throttle body and cleaned out thoroughly. Cleaned IAC valve out, checked all battery terminals, grounds etc. Checked fuel filter again.Found one pretty bad vacuum leak where hose was disconnected fixed that. SO heres what I know know.
Fuel pressure good/pump turning on and running no noises
No vacuum leaks now
No ground problems
Took car for drive runs and idles flawless. Gave it bout 3/4 throttle and climbed rpms flawless and shifted flawless. Got on highway and Floored it it accelerates flawless no weak spots or backfiring but as soon as it gets to where it should be about to shift and just cuts off. No backfiring no lag just engine dies. Pulled in shoulder again, cranked right back up. So i did it again same results. Accelerates flawless soon as gets to where should shift at WOT engine dies. Cranks back up drive it around another 30 miles or so getting on it but not fully opening and absolutly no problems. Does anyone have any clue seriously what the hell this could be? Again not throwing any codes, no signs of any problems just dies right at shift point it seems when WOT. So you can see why I dont exactly want take to dealership or shop pay azz in labor costs for something that requires them to ride around flooring it in my car.

My thoughts are:
TPS? but why no other signs? and car started with MAF unplugged,and TPS in.
maybe fuel relay? But why only at WOT?

Im just pist because it only dies at WOT right when should shift, climbs rpms flawless. And starts right back up and drives fine ...
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Old 07-20-2009, 05:25 PM   #3
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post in the lt1 section, more help there.
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Old 07-25-2009, 08:43 PM   #4
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I would try changing the TPS. Sounds like the ECM isn't getting the correct info for WOT. Is it any shift or a specific shift like 2-3 or 3-4?
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96, camaro, dies, dim, dying, engine, headlights, iac, leak, lt1, random, symptoms, vacuum, wot

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