C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Stalling Problem

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Old Jan 27, 2008 | 06:57 PM
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Default Stalling Problem

My 88. Today I took a ride about 6 miles round trip. I stalled 5 times. I will be riding along and the car just shuts off. After about 5 to 10 min it re starts and runs fine for about 1 or 1 1/2 miles and then shuts off again. Seems like the fuel supply is interupted but I really have no clue. The fuel filter is new. Where is my fuel pump located?? Please Help. I have a beautiful 88 35th Anniversary and I am afraid to take it out..
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Old Jan 27, 2008 | 07:32 PM
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Your fuel pump in located inside the fuel tank. Could be a lot of things there actually though. Could also be ignition problems, etc. But to check fuel pressure you need a gauge and hose and the fitting to check it is on the Passenger side fuel rail towards the rear. It is a schrader valve type fitting. You may need to tape the gauge to the windshield and take a passenger to watch the fuel pressure to see if its dropping when the problem occurs.

Good luck!
Gary in Louisville
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Old Jan 27, 2008 | 08:22 PM
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Are you getting any codes? It could be anything from a clogged fuel "sock" a clogged fuel filter, a bad key pellet kicking in the VATS system. The 5 to 10 minute wait time sounds like the VATS.
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Old Jan 28, 2008 | 02:51 PM
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How old is your battery?Could be!
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Old Jan 28, 2008 | 04:31 PM
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The vats system does include a fuel pump enable relay also a starter enable relay.In my case the latter became intermittent but would usually come back to life after about ten minutes.It's behind the central display and is only a $12 item.Before you rip it to bits try the fuel pressure check as suggested.Also perhaps a faulty key pellet.Try it with the spare key.Set the switch to show battery voltage and see if it changes when it quits.I'm 99% sure you are describing a fuel related problem not ignition unless your module is on the blink.
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Old Jan 28, 2008 | 07:46 PM
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always,always,always -- check fuel pressure first.

''ignition module'' in distrib, maybe...ez change-out to a ''known good''
module will tell.

but you have classic ''clogged cat'' symptom...refer to ''Service Manual'' for kitty check procedure.
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Old Jan 29, 2008 | 03:42 AM
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I experinced the same symptoms and suspected a faulty fuel pump or relay. As it turned out, it was a faulty ECM. The injectors were losing their pulse signal. Put a noid light on one of your injector connections and let the car idle until it dies. If you lose your injector signal just before it dies (2-5 seconds) you may have the same problem.
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Old Jan 29, 2008 | 08:06 PM
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Default Clogged Cat Symptom

What is this?? If it refers to the catalic conveter I have only about 1000miles or less on mine, I doubt it is clogged...
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Old Jan 29, 2008 | 08:33 PM
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Originally Posted by fille9
What is this?? If it refers to the catalic conveter I have only about 1000miles or less on mine, I doubt it is clogged...
at 1k the cat (catalytic converter) ''should'' still have all nine lives left...but your quit/sit/run/quit problem is precisely the symptom of a severely plugged cc (cat)...''back pressure'' check is free ($10 gauge if you don't already own an ''old-school'' vacuum/fuel press tester) ...should elim ''all the usual suspects'' before throwing $ at it.

btw, a ''partially plugged'' cat may glow red in the dark and just reduce power.

Last edited by redrose; Jan 29, 2008 at 08:38 PM.
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