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Spark and fuel are controlled by the PCM (Power Control Module), the PCM grounds the ASD relay (Auto Shut Down) which in turns sends power to the ignition coil and to the fuel injectors, the injectors open upon receiving a ground signal from the PCM as well as the ignition coil fires a spark when it gets the ground signal from the PCM, now none of this will happen if the PCM does not get a signal from the CKPS (crank position sensor) this sensor tells the computer the engine is spinning as well as where is the piston located at that instant of time in order for the PCM to give the ground signal to the coil fuel injector or the ASD which gives the juice to those components.This sensor is located in the rear of the engine is a 3 wire plug and it sends its signal from the presence of windows in the flywheel.
What else can I help you with?
1991 Grand Cherokee where is fuel pump?
fuel pump is in the gas tank
Is a 6-cylinder jeep Cherokee 1991 fuel injected?
Yes.
Why wont my 96 jeep grand Cherokee start.?
Does it turn over? Does it have fuel, spark and compression?
95 Jeep Cherokee sputtering on acceleration?
if it is an automatic could be spark plugs or spark plug wiring...if a manual check the fuel pump
Where are the spark plugs on the 1999 Jeep Grand Cherokee V8?
They are under the coils, next to the fuel injectors.
1991 dodge colt 1.5 liter has no spark or fuel?
Computer is toast
What might be the trouble if your 1989 Jeep Cherokee won't start even though it cranks?
Check for fuel and spark
1991 Pontiac 6000LE won't start?
Does it turn over? Does it have: fuel spark compression?
Why would a 1991 capri xr2 not maintain an idle?
poor spark, poor fuel grade, fuel pressure, spark plugs, not getting enough air... one of the above
Why won't a 2000 4.7l jeep grand Cherokee start?
Battery? No spark? No fuel? Any trouble codes in the computer?
Why does my 2001 Jeep Cherokee runs fine most of the time but has stranded me twice by stalling and wont start for over an hour then starts and runs fine for several days?
It is losing spark or fuel. Next time it dies check for spark. If it has spark it is probably a fuel issue. My guess it is a tired fuel pump.
Your 1991 plmouth colt will not start and it has fuel and spark?
i would check the timing. check for compression.
