This is a 1994 with the 5.7 this is a old police car with the LT1 motor....the car runs for about 5 min and shut off....i get a smell of fuel....the car will not start up for about hour and it is a rough idle at first....I am getting black soot out of both tailpipes...now i did just replace everything on this car, map sensor, wires, plugs, air flow sensor, ing. module, coil, ...the car is threwing no codes, (With OBD 1....they may be some codes that I cannot pick up)....now I did notice yesterday that the Eletric Air Pump (It pumps air into the exhaust man and does something/reused with the fumes... well the negative on the connetor is almost melted, like some kind of short, I believe that the pump burnt out....I guess this may cause the car to run rich and will this cause the car from running???
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Re: wont stay running
The air pump will not change fuel mixture it is used to reduce emissions by adding air to the exhaust to allow the fuel to finish burning after you replaced all those sensors did you reset the computer (unhook the battery for about 5 min)?
i would pull the plugs clean them, with the plugs out crank it over to clear the cylinders. reinstall the plugs and start it
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Apr 9, 2012 - Couldn't reach the other side before running out of time. .... Does the carstart up after it has sat for a while and cooled off? 1994 Z-28 LT1 A4, Supercharger 6 psi, 3.73 Gears, GMPP 1.6 Rockers, LT4 Springs, ... Ten minutes into a drive it willstart to sputter and then die, ... so nice!...for about 20 minutes.
Jan 8, 2011 - 1994 z-28 m6 procharged all the goodies ... to get hot lol.. change back to stock if you want it to run a regular temp ... I hit the freeway almost immediately afterstartup so the car doesn't really get a chance to "get hot". ... To answer the original question my old LT1 took about 15-20 minutes to blow warm heat.
The fan should come on and should flash 1 then 2 for normal operation. Your IAC valve on the throttle body should be cleaned or replaced. After reinstall , turn key to on position for 1 min. then off for 1 min. To reset.
No it is likely the OPTI SPARK distributor has failed, it is the Achilles heal of the LT1 V8. The distributor is located under the water pump on the front of the engine, if the water pump leaks it goes right into the distributor. To replace the distributor you must drain the cooling system and remove the water pump and all other obstructing parts to get to it. Before you replace any parts I suggest you have a trained technician run a scan of the system for fault codes, other things can cause this as well. The distributor is very expensive and i am only guessing based on my experience with my own 1996 Corvette LT1
Hello! are you using the harness for that year LT1? the fuel air mixture is controled by the Manifold Absolute Pressure (MAP) sensor, the Throttle Positioning (TPS) sensor and the Oxygen sensors...When you put your foot in it without O2 sensors there isn't any control over fuel/air mix and ignition advance if the MAP and TPS aren't connected...I'm assuming your using the LT1 ECM...Guru...saailer
It should be a plug and play if your using the ECM for the 1994 engine. The ECM on the 1996 S10 will no work on the LT1 engine, for one thing the S10 ECM will only command for 6 fuel injectors and will have different injection pulse and so on. The program of the S10 ECM is made for the Vortec as to the LT1 will have different parameter **** as engine running temperature, vacuum readings, and timing.
The most obvious would be the 1994 LT1 runs on a OBDI system and the 1996 is running on a OBDII system. You can still run the 1994 LT1 from a 1994 with a OBDii system ecm, but some of the sensors will need to be upgraded to accommodate for the proper readings the OBDII system will need to have the engine to run right.
If you don't have the right ECM for the LT1, go to the wrecker's and locate one, Caprice, Camero, Firebird ECT.....
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