I have a 1992 Cavalier, 2.2 L. The car will start, but runs rough, always trying to stall out until it eventually does. I replaced the ignition module, coils, and the crank sensor. Still has the same symptoms. The computer keeps giving me a 42 code-electronic spark timing malfunction. Plugs and wires are good as well. I've read up on the other possibilities such as ground and what not. I don't know where to go from here. Someone suggested that a fried fusable link could be a possibility. Any suggestions on where to go from here would be greatly appreciated. Thank you!

SOURCE: HELP! I have a 95 gmc 4x4... sank it underwater.

the starter could be too close to the flywheel. try adding a couple of starter shims. it also could be drawing to many amps from internal corrosion from water intrusion.

SOURCE: 98 Chevy Vortec 5.7 NO SPARK

your ecm or engine control modual, usually located behinde the glove box.. it fontroles the coil and distrubator funonctions

SOURCE: 1995 sarari van stalls. replaced fuel pump

when you shut the truck off is/was there a swishing/bubbling noise coming from the tank?

Theres an orange rubber in the fuel tank that connects the fuel pump to the sender lines. if that rubber is torn you may get it to run but not stay running for more than a short period of time.

Harvey N Tawatao

• 3854 Answers
• Posted on Oct 10, 2010

SOURCE: I have a 1992 gmc

CODE 42 Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system.
During cranking, the timing is controlled by the ignition module while the ECM monitors the engine speed. When the engine speed exceeds 400 RPM, the ECM sends a BYPASS signal to the ignition module which switches the timing to ECM control. The ECM calculates what the timing should be then "tells" the ignition module via the EST circuit.
An open or ground in the EST circuit will stall the engine and set a Code 42. The engine can be re-started but it will run on ignition module timing.
The conditions for setting this code are:

• System in BYPASS mode but the ignition module is still controlling timing
  - or -
• Engine speed > 600 RPM with no EST pulses (ECM controlled timing) going to the ignition module for 200 msec.

SOURCE: 1994 GMC K1500. Ran great,

As per the problem which you mentioned in your question it says " Once it gets up to op temp, idles very rough, won't take fuel, eventually dies. Won't restart til cold."------- ------- Its low fuel pressure or problem with o2 sensor.----------

As per your problem mentioned, it indicates the problem with fuel pressure.-------- The fuel pressure is low.---------- First thing you can do is get the fuel pressure checked, this will confirm the problem. --------- If the pressure checked low that means problem is with faulty pump and clogged fuel filter.----------- If the fuel pressure is checked ok, then other possibility is faulty o2 sensor and crank sensor. The o2 sensors are before and after catalytic converter.-------Both the sensors are to be replaced.------ And as per you mentioned your problem, its quite possible that faulty o2 sensor will cause this problem.------ O2 sensor is the part which sends signal to ECM( the cars computer).It sends signal to computer about fuel / air mixture.How and when to send fuel to engine.--------- If o2 sends stops sending signal to cars computer then it will not send the fuel to engine.------- In your case the o2 sensor is getting overheated and this is stopping the o2 sensor from sending signal to ECM.But when your car shuts off the sensor gets cool and again it starts working.------ So as per problem, get both the o2 sensors checked and replaced.---------- Also get the crank sensor checked.--------This will help.Thanks.Helpmech.