BlackMagicC5

iTrader: (2)

A friend of mine has a 95 impala SS with an LT1. It randomly shuts off during driving, but always starts right back up. He replaced the fuel pump and related items which didn't help. He also mentioned that the entire car was recently detailed, including the engine. I'm thinking theres a chance something got wet or messed up. I don't know much about LT1's, anyone have any ideas on what to check or look for? We'd like to start with the fairly easy common things first, then look into more serious possibilities. Thanks for any help.

Honda Hunter

iTrader: (8)

Could be a high res failure but that would leave a code. I'd say check the opt harness first and scan it for codes.

BlackMagicC5

iTrader: (2)

He said there are no codes.

donkey mule

Possibly opti.

96lt1m6

iTrader: (31)

the icm could have a short

Honda Hunter

iTrader: (8)

With a High Res Failure the light would only pop up for a brief moment then go off but it would still be saved. Did he run a scanner yet? I'd also verify the fuel pressure using the proper methods.

Hot94Z28

Could be ignition switch the one on the inside of the colum or ICM if he has not changed that or like 96lt1m6 said a short

Dr. Teeth

iTrader: (4)

The 96 I bought had that problem. Turned out to be the opti, he had an oil leak that soaked the opti and shorted out the optical device. Check that maybe?

lt1taracing

mine did it a few weeks ago and turned out to be the computer.

94 F-body

iTrader: (1)

Yea I would check the electrictal side, make shure nothing is grounding out before its time or pourpose, seince there has been no codes set. For instence check the spark plugs to see if all 8 are firing and trace the system back from there.

Louvit

does he have an msd box? mine did that and it was a bad msd

Speedy

Same thing happened to me. Optispark was shot. Would drive and the car would stutter, sometimes just die for no reason. Then it would start like nothing was wrong. Just installed a new MSD.