Jeep cherokee xj 1999 sputtering down the road and sometimes stalls. - Page 2 - JeepForum.com
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post #16 of 24 Old 11-17-2015, 10:01 AM Thread Starter
CasualTrips
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yes except I haven't done the grounds yet but it runs perfect just except when im in drive either holding the break or moving at a constant speed. If I put it in N while at lights it doesn't try to stall out. and I have not checked my fuel pressure yet but will. I doubt thats the problem when I take the cap off of my rail and push that little button thing I get a nice stream.

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post #17 of 24 Old 01-03-2016, 05:42 PM Thread Starter
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I checked my grounds it wasn't that sorry I haven't been on in a while but my Jeep is still doing this. It mainly does it in the morning until it's at running temp but will do it randomly sometimes too. Could my fuel rail be clogged possibly? I have a cracked exhaust manifold and bad o2 sensors but I doubt they would really cause this. Is there anything else I can do? It only picks up the o2 sensors and some sensor below the battery when I scan it at auto zone.
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post #18 of 24 Old 01-03-2016, 06:02 PM
hoss50
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Ignition coils?
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post #19 of 24 Old 01-03-2016, 09:40 PM
CJ7-Tim
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Quote:
Originally Posted by CasualTrips View Post
I have a cracked exhaust manifold and bad o2 sensors but I doubt they would really cause this. Is there anything else I can do? It only picks up the o2 sensors and some sensor below the battery when I scan it at auto zone.
If the Check Engine Light is ON, download the trouble codes and fix the malfunctions the codes relate to.

The symptoms described, fit the malfunctions the trouble codes are showing. You should have mentioned the trouble codes when you first posted.

Buy genuine Jeep sensors, and NTK O2 sensors. Cheap parts are cheap for a reason.

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post #20 of 24 Old 01-04-2016, 10:44 PM
Tommy2jeeps
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Quote:
Originally Posted by CasualTrips View Post
I checked my grounds it wasn't that sorry I haven't been on in a while but my Jeep is still doing this. It mainly does it in the morning until it's at running temp but will do it randomly sometimes too. Could my fuel rail be clogged possibly? I have a cracked exhaust manifold and bad o2 sensors but I doubt they would really cause this. Is there anything else I can do? It only picks up the o2 sensors and some sensor below the battery when I scan it at auto zone.
This is exactly your problem.

O2 sensor determines if your engine is running rich or lean and adjusts accordingly. So it would make sense that if either your cracked header is allowing a different exhaust mixture to be read, or if your o2 sensor is on its way out (common around 150000) that it would make your engine not run correctly.

Replace or repair the header and order up one of these. Do NOT install a bosch o2 sensor.

http://www.amazon.com/gp/product/B00...ilpage_o01_s00


Also if you replace your header with a APN header or knock off you will probably have clearance issues with the #5 and 6 exhaust tubes hitting the intake manifold (99's have the newer style larger intake manifold). I'd recommend buying a factory style (accordion tube) manifold and just having the infamous down pipe dent removed at the same time.
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post #21 of 24 Old 01-05-2016, 04:10 PM Thread Starter
CasualTrips
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Quote:
Originally Posted by Tommy2jeeps View Post
Quote:
Originally Posted by CasualTrips View Post
I checked my grounds it wasn't that sorry I haven't been on in a while but my Jeep is still doing this. It mainly does it in the morning until it's at running temp but will do it randomly sometimes too. Could my fuel rail be clogged possibly? I have a cracked exhaust manifold and bad o2 sensors but I doubt they would really cause this. Is there anything else I can do? It only picks up the o2 sensors and some sensor below the battery when I scan it at auto zone.
This is exactly your problem.

O2 sensor determines if your engine is running rich or lean and adjusts accordingly. So it would make sense that if either your cracked header is allowing a different exhaust mixture to be read, or if your o2 sensor is on its way out (common around 150000) that it would make your engine not run correctly.

Replace or repair the header and order up one of these. Do NOT install a bosch o2 sensor.

http://www.amazon.com/gp/product/B00...ilpage_o01_s00


Also if you replace your header with a APN header or knock off you will probably have clearance issues with the #5 and 6 exhaust tubes hitting the intake manifold (99's have the newer style larger intake manifold). I'd recommend buying a factory style (accordion tube) manifold and just having the infamous down pipe dent removed at the same time.
A friend of mine is getting me a header off a junk Cherokee Saturday and I'll get the sensor. I'll keep you updated thanks!
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post #22 of 24 Old 01-05-2016, 09:02 PM
FairlanePhil
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Also, take a look at the small fuses in the underhood box.
There is a 15 amp closest to the windshield that throws 02 codes.

I just replaced one and the Jeep runs a lot better. I'm still getting 9mpg because of the header crack in mine. I have a new sensor in front and I found that the rear sensor was blowing the fuse because the wires were in contact with the driveshaft

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post #23 of 24 Old 01-15-2016, 10:54 PM Thread Starter
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Friend didn't get the manifold last week he should be getting it tomorrow.
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post #24 of 24 Old 01-17-2016, 10:57 AM Thread Starter
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Damn the header he had has started to crack he didn't know so now I'm gonna have order one online
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backfiring , cherokee , jeep , sputtering , stalling

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