Last post on Oct 29, 2013 at 2:17 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee
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Jeep Cherokee, Transmission, SUV
#129 of 276 Re: 1990 Jeep Cherokee 4.0 - Hard Start - Backfire in gear [magicmaster]
Aug 01, 2008 (7:14 am)
Update: Replaced CPS, plugs and wires, double-checked plug gaps. Removed/cleaned the idle step sensor. Runs a bit smoother now. It will put to the local convenience store, however, still gets bogged down if given too much gas while in gear. In park or neutral, runs fine, no obvious misfires. I've checked vacuum levels at the EGR solenoid and it was around 15hg and did a manual test on the EGR valve. Also have removed the Catalytic Converter to verify that it wasn't causing too much back pressure buildup. I have also sprayed starting fluid around the vacuum hoses/tubes to make sure there wasn't a hidden vacuum leak. Besides replacing more components (Cam Position Sensor and MAP are next on my list).. any insight would be appreciated.
#130 of 276 2000 Cherokee Sport 4.0 auto-hard start-stall
Aug 05, 2008 (1:10 pm)
I was hoping someone might be able to help. Hopefully, I can phrase my problem correctly....
I have a 2000 Cherokee Sport 4.0 auto. It has 98000 miles on it, I bought it new and kept up all the maintenance.
About two weeks ago, it started giving me problems with hot start after a really hot day driving with the A/C on. It started fine cold. When hot, I had to really give it gas to get it to start and not immediately stall out. After a few minutes, the idle leveled out and all was well.
A week later, the condition reversed. Hot starts were easy; one crank and good, no rough idle. Cold starts became troublesome, long crank, rev the engine until it levels out, all is well. Unfortunately, the cranks are wearing down the battery and the problem is one my local mechanic can't nail down. His only comment was the battery seemed drained-- 11 volts (no wonder with all the cranking). I plan on replacing it as it's four years old already and probably won't cut it for a New England winter, but I'm skeptical that it's the problem.
Any thoughts? TPS? CPS? Coolant sensor? Plugs are three months old, Champion truck. I have the Haynes manual and I was planning on checking voltage resistance on each sensor.
BTW, I checked the forum already and saw the bit about priming the fuel pump by switching it on and off twice. It seems to make no difference.
Any and all suggestions would be great.
Thanks in advance.
#131 of 276 Re: 2000 Cherokee Sport 4.0 auto-hard start-stall [jkratman]
Aug 05, 2008 (7:37 pm)
with 4 year old battery i would change that first as jeeps are sticklers on volts from bat change that and see if takes care of prob before you spend lots chacing stuf
#132 of 276 Electrical is dead
Aug 08, 2008 (7:15 am)
I own a 98 jeep grand cherokee laredo 4x4 straight 6 cylinder, my problem is i started it one night drove for about 30 yards I noticed my headlights went out first then the engine shut off. I thought this was weird so i tried starting it back up... it would not start nor did I have any headlights or horn or radio ... and i could'nt get my windows back up. I checked fuses I did not see any blown fuses. the real weird thing is that a jump will not help but the vehicle turns over, just wont start and no electric.... what could be my problem?
#133 of 276 Re: 2000 Cherokee Sport 4.0 auto-hard start-stall [tuggajb]
Aug 08, 2008 (8:34 am)
Yep, problem solved. It _was_ the battery, thanks. Maybe I should trust my mechanic!
#134 of 276 Re: 95 Cherokee Starting Problem with Shift Lever [johnnyb173]
Aug 10, 2008 (4:08 pm)
I just looked up the neutral safety switch for a 95 Grand Cherokee 5.2 liter V8 for $9.99.
#135 of 276 Re: 1990 Jeep Cherokee 4.0 - Hard Start - Backfire in gear [magicmaster]
Aug 10, 2008 (6:48 pm)
What's your fuel pressure?
TPS voltages check out across the sweep range? (A Digital volt meter might miss any dead spots -heck an analog might miss a dead spot too but an old school volt meter with a needle will catch a dead spot easier.)
#136 of 276 Re: Electrical is dead [harry44]
Aug 10, 2008 (6:54 pm)
What's the battery voltage? Cables in good condition with NO crappy aftermarket clamp-on style terminals? (They corrode underneath the clamps & loose contact.) Any faults showing from computer?
#137 of 276 Re: 1990 Jeep Cherokee 4.0 - Hard Start - Backfire in gear [lunghd]
Aug 12, 2008 (9:45 pm)
Spot on.. I actually replaced my fuel pump assembly and a fresh fuel filter this last weekend. I noticed that I had no pressure at my test port on the fuel rail after an attempt to start. Fuel pressure was a little over 15 lbs with ignition on and was suffering from pretty bad leak down, losing pressure fast. Now it starts within 2 seconds of cranking and has plenty of power, enough to powerbrake with ease (my neighbors could tell I was happy Fuel pump was definitely my problem..
#138 of 276 95 Jeep GC 4.0 Stalling under throttle
Aug 24, 2008 (12:23 pm)
I have a 95 Jeep GC, 4.0 6 cyl, auto. I have recently replaced the starter, battery, and did a full tune-up. I am having problems with it stalling while in any gear other than Nuetral or Park while I am pushing on the throttle. It will idle fine while in gear and I can rev it up to redline with no problem when it's in N or P. Please help with any ideas. Thanks