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'92 Wranger 2.5L Cold Start Problems


 
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mr_ed33
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Joined: 20 Feb 2006

PostPosted: Mon Feb 20, 2006 1:46 pm    Post subject: '92 Wranger 2.5L Cold Start Problems Reply with quote

I have a newly purchased '92 Wrangler with the 2.5L (54,000 miles) that has but just one problem..... it doesn't like to start when it's cold. If the vehicle has sat for awhile and is cold, the engine cranks and cranks before it sort of fires and stalls. I then have to crank the engine a second time at which point it normally fires and runs fine, idles perfect, drives great, has no other issues running cold, just doesn't like to start. The colder the weather, the more it cranks. Any ideas? I have given the Wrangler a complete tune-up with no improvement. (Wires, plugs, cap, rotor, fuel and air filters, etc.) Thanks.
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mr_ed33
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Joined: 20 Feb 2006

PostPosted: Wed Feb 22, 2006 9:50 pm    Post subject: Reply with quote

'92 Wrangler, almost bone stock, HT/ST equiped for Fire Department First Response, otherwise stock vehicle. Please comment with ideas as to why it won't start easily in the cold. Thanks.
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qkslvr_95yj
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Joined: 28 Dec 2005
Location: RI

PostPosted: Thu Feb 23, 2006 5:07 am    Post subject: Reply with quote

i had a similar problem with mine (95 2.5L) when the temp. dipped below about 30 i would have to crank it for about 4 minutes (15 seconds at a time) and it would finally start to catch and then run sorta ok...

my mechanic checked everything after i had done the tune up.
turns out the crank sensor on the driveshaft was starting to go BUT
the big problem was the ECM (engine control module, ie. the main computer) had what the mechanic called a 'thermal short' somewhere inside the computer wiring (ie. there was a break in a wire or connection someplace that worsened with lower temperatures due to the shrinking of metal in cold.) he came by this of checking every code problem at different times and weather temps (he had my jeep for 2 weeks)

i don't know if he was pulling my leg but replacing the computer from a salvage yard for $150 solved the problem...

this might be a lot of nothing for you, but if it helps so be it.

good luck!
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