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Re: My 91 jeep cherokee wont start it cranks over but...
FUEL PROBLEM ! make sure its getting fuel to engine. spray a bit of starting fluid in throttle body. if car starts then dies, its a fuel problem. good-day !
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No cranks is here https://www.jeepdied.com/no-crank.html TURNS OVER MEANS ZERO. the starter just CRANK. THE START MOTOR TURNS IF lucky so does the crank shaft turn. then the engine starts and runs, (this is not turns) it's running the EFI then sustains running , if ABS stays happy. the engine can also stall.
which engine option? 4 Liter>
fuses good?
does it crank robustly? full cranking speed, not slow and weak.
does it have spark ?
does spark last for more that 2 seconds cranking
does the ASD drop out cranking> (big clue there)
if it has spark and ASD holds, then try test fuel, does test fuel start
car , even if only for the magic 2 seconds jeep rule>>????
Too many items that can cause that for anyone to give you an absolute "fix" but : You need to do some testing to narrow it down to if you have a fuel or ignition problem (spark). If it starts when you crank it and spray carb cleaner into throttle body, then it's on the fuel side. One common item to both and a common failure item as well is the crank position sensor. Check that as well. There are tests that you can do using a digital volt-ohmeter. Tests and expected results are listed in haynes or chiltons as well as other inexpensive manuals. Don't change anything unless you verify it as bad and if you have a security system make sure it is not locking you out from starting. Once tested, you can ask back here for specific problems if any. Good Luck
You need to check and see if the plugs are getting voltage/spark. If they are not then check and see that the coil is getting voltage. It sounds like you possibly have a bad coil. Something is causing your plugs to not fire.
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