I thought I got my parents jeep running fine yesterday but I guess not, here are the problems:
It doesnt like to stay running, when I start it, the idle is way low and it just shuts off. The idle is normally 500 but its been going as low as 300. There is no loss of power what so ever, it will gladly rev to 5000 and bounce off the rev limiter but as soon as you let off the gas it goes back down to 300 and after second, it shuts off.
I've replaced the water pump (dont ask) and it ran fine for awhile and then it started to fuck up again. Then, I changed the spark plugs about a week ago and it ran GREAT, more power than it ever had before and it would rev up alot faster than it used to, but now the problem is back.
I've about run out of ideas, its not drivable when its like this, everytime you come to a red light and stop, it stalls and you cant put it in gear at idle or it will stall, you have to rev it up to 1500 to put it in gear.
The check engine light has never come on and a friend of mine has put a diagnostic machine to it and it doesnt send any codes. What worries me is that it doesnt do this all the time, it seems like every time we fix something, it runs great and then the problem comes back like a week later.
Here are the specs:
'97 Jeep grand cherokee laredo 4x4 5.2l (318) 220HP.
I went out and held it at 2000 rpm until the water temp hit 150 and then left off and waddayaknow, the idle is back up and its running great, WTF!!!!!!. I took it out for a ride and floored it about 5 times to varius speeds and about 20 minutes later I pulled into the driveway and some steam started to come from under the hood. I opened the hood and its leaking coolant from somewere but I cant tell where, its all over the front of the engine. I took the radiator cap off and it puked some antifreeze. Why would cooling issues affect the idle speed and cause it to stall?
I replaced the water pump about a month ago and have been check it once and while for leeks and havent found any.
Post by furydriver on Feb 17, 2004 12:34:30 GMT -5
dude your update reminds me, check your temp guage, my buddy's ford taurus did that for a while it wouldn't cool off and would randomaly stall for no apparent reason, he said he had to replace the temp guage or fix it and now it works just fine
Why would the guage have anything to do with it? There may be a sensor that tells the engine to shut off if it doesnt warm up in a certain amount of time, but why would it just shut off at idle and not any other time? And if the senor was telling the engine to stop, wouldnt it run like shit all the time? because it doesnt, when you rev it up in park the whole damn jeep lifts.
Have you checked the timing on it? Maybe its gotten off and letting it drop down to low in rpm's causing it to choke out. Far as it leaking water, I dont know man that doesnt sound good. A cooling problem shouldnt make it bog down at idle tho.
1954 Bel Air 4dr 1954 210 4dr 1954 Chevy Bel Air 4dr 235I6/Powerglide 1958 Chevrolet LWB pickup. 235I6/4speed granny 1976 Chevrolet Nova 350/400 4.88's 1976 Chevrolet SWB 4x4 1/2 ton. 350/4speed 33's 1979 Chevrolet SWB 4x4 350/4speed 3/4 ton axles/Tcase lifted, 36's 1981 Mazda RX-7 1996 Ford Ranger SWB Reg. Cab 2.3L/5speed
I dont think its the timing, it hasnt lost ANY power and it doesnt "knock" under load. I'm going to replace the air temp sensor in the intake and replace the water temp sensor that tells the computer what the idle speed should be. As for the coolant leak, my dad brought home a thing that puts presure in the system and it held 15 psi, so there shouldnt be a problem.(still a concern though, coolant doesnt leak out for no reason)