Question about 1993 Jeep Grand Cherokee

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Wont start when cold

Its a 93 jeep cherokee it starts when ists warm but does not like to when its cold it wants to start it cranks over.it has a new distribiter cap

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  • vosahlosean Nov 23, 2008

    I have same problem!!! 1992 Cherokee If I plug it in at night it will start. Temp sensor???

  • S Catron Nov 26, 2008

    I have a 1993 Grand Cherokee Laredo with the same problem, new cap rotor and plugs. will run perfect when it does start and will start fine when warm. does not start when cold until I crank it for about 5 minutes. cycling the key only floods it. once it does start it will run rough for about 1 minute then runs just fine agian till it gets cold again.

  • petep63 Feb 27, 2009

    Same problem with my 93 Cherokee. Occasionally will start and run fine - usually on a warm day. Then suddenly wont start - usually on a cold am. When this happens, there is no spark from the coil. I have replaced the coil and the crank sensor - same problem. Any suggestions.

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  • 475 Answers

There have been bad fuel pump regulators where they will leak fuel into the vacuum line that's attacthed to it. Pull off the vacuum line and see if gas drips out of it(replace the regulator if gas is present).
The regulator is on the fuel rail.

Posted on Dec 04, 2008

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When the outside temp is below 30 degrees my 1994 jeep grand cherokee 4.0 will not start


lots of guesses. sure.. common here.
first would be a real tuneup , using the 60,000 mile list. for sure.
filters and spark parts. (my guess is you did)
1994 is a great year, all 93+ jeeps are good from 93 to now.
I presume this is USA car, and you scan it and there are no
DTC errors.????
seems its flooding ,
if 5% throttle makes it start, that is lack of air or flooding
if wont start and the super secret WOT crankings clear flood , then was flooded, Wide open throttle cranking , cuts all fuel (the secret)
so is , IAC/ISC stuck closed, chean it yet.
or injector leaks (pass the injector leak down test ,does it?0

got 500k miles o jeeps from 88 to 99+
and the ISC stick on them all.

the ISC is the electric, ldle speed control valve.
if it sticks closed, you cant get full air supply to start.
had to clean mine every 10 to 20k, miles.
until i found the magic, spray that cured that.
"klondike gun lube spray": looks like teflon after it dries.

that run rough started is called misfire.
and is flooding, (if injector are not leaking) its air supply wrong.
one more thing,
the ECT must read 30F when parked overnight, and was 30f.
see? a cold engine will be near ambient air, first thing, in the morning.

running old fueL:?
running summer fuel from last August?
the ECT sensor causes injections to match true temps.
make sure it reads right for all bets off.

clean ISC first. not shot gun parts
for that cash you could have got a nice scan tool.
like this.

http://www.walmart.com/ip/Equus-3140-Innova-Diagnostic-Code-Scanner/14644660

the prefect tool for 93-95 jeeps. does OBD1 on JEEPS !!!!

Mar 03, 2015 | 1994 Jeep Grand Cherokee

1 Answer

My jeep wont start in cold weather even when it is plugged in. turns over but wnt fire. starts good when the weather warms up. replaced distributor. new battery. new coil.


Sounds like you need to have your ecu repaired. I've seen this problem on 91-98 Grand Cherokees due to components inside the ecu slowly failing, and really acting up when the weather is colder. A good indicator as to if you have this problem is if your check engine light takes a while to light up, on the dash, when you turn the ignition on, before trying to crank the engine. If the light is delayed in your jeep, you need to repair the ecu.

Mar 09, 2011 | 1996 Jeep Grand Cherokee

1 Answer

93 jeep Cherokee wont start


Could be a crank or cam sensor gone bad. I suggest you get a haynes or chilton manual and do the testing outlined in them to determine which it is. Neither item is very inexpensive and the crank sensor is a real pain to replace. There are other things that can do that so testing is important.
Crank sensor is the most common failure but asd relay, wiring problems, bad ground on a relay etc can do much the same thing.
Anything you find that you need further help with I'll be happy to answer if I can!
Good Luck!

Apr 17, 2010 | 1993 Jeep Grand Cherokee

1 Answer

93 jeep grand cherokee 4.0 L wont start.


start by tracing the wires back to the computer checking for breaks in the wire or corroded terminals

Mar 23, 2009 | 1993 Jeep Grand Cherokee

1 Answer

93 jeep 4.0 not starting


check the ignition coil pick up

Mar 23, 2009 | 1993 Jeep Grand Cherokee

1 Answer

Car wont start up right away


Crank or cam sensor probably as plugs bad plugs would start but miss the sensor will either give a start or no start condition and on 1 truck the crank sensor went out and it would run cold but miss like crazy when warm,I work in a chyrsler shop and have never seen that happen and even a scan tool didn't pick it up.

Mar 09, 2009 | 1998 Jeep Cherokee

1 Answer

Jeep cherokee sport,engine wont start unless worm.


Check the temperature sensor...it tells the computer when it's cold, and changes fuel mixture accordingly. (same as a choke used to do)
Just curious...If it only starts warm, how do you get it warm???

Mar 07, 2009 | 2001 Jeep Cherokee

1 Answer

It won't start when it is cold but starts fine when warm. Will start eventually if you pump the heck out of it and crank it and repeat quite a few times. I have a 91 cherokee that won't start when it's...


Try cycleing ur key a few times before actually cranking it alot of the time wen a fuel pump is about to go it wont prime cycling the key will prime it. As for the fuel gauge thats part of the fuel pump its called a sending unit and in the jeeps its all in one unit. it sounds like your fuel pump is about to go tho. i had the same problem with my 93 jeep grand cherokee laredo. i replaced the fuel pump and it runs fine now u can get it from your local autozone for about 140. hope this helps let me know

Nov 22, 2008 | 1993 Jeep Grand Cherokee

1 Answer

93 Grand Cherokee 4.0 trouble starting in cold weather


Welcome to the forum. Your question has to many variables. Cold weather out here in Cen Cal this time of year is mid 40s. Is the problem when the vehicle is cold as in ovrernight but starts ok when it is warm? Does it crank OK but seem like it's not getting fuel? If you hold the throttle slightly open, does it start OK?

May 14, 2008 | 1996 Jeep Grand Cherokee

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