low/rough idle cherokee, need help
#46
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Being as this engine is a complete rebuilt block from a machine shop would it be possible the timing gears are off a tooth?
I personaly wasn't there to comfirm them being spot on when my buddy swapped all my trim off my old engine to the new one.
I think I did it correct, according to your tips, I may pull it again just to tripple check, how far should the rotar be in relation with post #1 ?
Last edited by noraayrrek; 04-30-2015 at 12:25 PM.
#48
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Year: 1990
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Engine: 4.0
#50
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What elevation do you live at?
#52
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#53
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So I don't even know what to try anymore.
This spudder, rough idle, and miss/back fire when first starting then moves to a decent idle until the motor starts warming up, then it's just low and almost stalling at every stop, I am beginning to thing this jeep is cursed. I have spent 14k building this thing and it still runs like **** after doing the motor
I think I may just pull the cover off to confirm it my self that's its good.
But I just remembered I installed that egr block plate when I put the new block in so maybe it's leaking and sucking exhaust in ?!? I used some hitemp silicone and but fired it up 30 min after putting it on so maybe it didn't dry and seal properly?
#54
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Well I have done so much to fix this motor to get it to run properly, this extrelmly low idle and almost stalling issue started when the new block was installed. My buddy said he didn't confirm the cam timing before he put the cover on.
So I don't even know what to try anymore.
This spudder, rough idle, and miss/back fire when first starting then moves to a decent idle until the motor starts warming up, then it's just low and almost stalling at every stop, I am beginning to thing this jeep is cursed. I have spent 14k building this thing and it still runs like **** after doing the motor
I think I may just pull the cover off to confirm it my self that's its good.
But I just remembered I installed that egr block plate when I put the new block in so maybe it's leaking and sucking exhaust in ?!? I used some hitemp silicone and but fired it up 30 min after putting it on so maybe it didn't dry and seal properly?
So I don't even know what to try anymore.
This spudder, rough idle, and miss/back fire when first starting then moves to a decent idle until the motor starts warming up, then it's just low and almost stalling at every stop, I am beginning to thing this jeep is cursed. I have spent 14k building this thing and it still runs like **** after doing the motor
I think I may just pull the cover off to confirm it my self that's its good.
But I just remembered I installed that egr block plate when I put the new block in so maybe it's leaking and sucking exhaust in ?!? I used some hitemp silicone and but fired it up 30 min after putting it on so maybe it didn't dry and seal properly?
#55
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I didn't install the intake or exhaust manifold but they look like they are seated properly, they are stock.
If I blow smoke into the intake manifold and see if I see any smoke blow out anywhere would that work too?
I'll try the carb cleaner too!
If I blow smoke into the intake manifold and see if I see any smoke blow out anywhere would that work too?
I'll try the carb cleaner too!
Last edited by noraayrrek; 04-30-2015 at 10:42 PM.
#56
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Year: 1990
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I'll tell you this though.
Many aftermarket manifolds/headers do not allow the intake manifold to seat properly as it hangs up on the dowels or near #1 and #6 cylinder. I've had to file the intake manifolds to get them to fit.
#57
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So I checks my buddies cherokee and his is pulling a vac of 14-15hg at idle and when revving it up he pulled about 19hg on my gauge
Mine is pulling about 12hg at idle with tiny needle fluctuations and when revved up pulls about 18hg. But when I let off it settles down to 14hg for a sec then returns to the 12hg
Okay I have no vacuum leaks, tried smoke and I tried carb cleaner, but I did notice that when I sprayed it into the intake the jeep bogged down, so I am guessing that means I am definatly running rich?
The egr block off plate is sealing well
I also pulled my computer down and pulled it apart, looks good as new inside, but I did notice two stray wires were there? No sure why or where they go, because I didn't see any on the harness cut any ideas where they go?
Mine is pulling about 12hg at idle with tiny needle fluctuations and when revved up pulls about 18hg. But when I let off it settles down to 14hg for a sec then returns to the 12hg
Okay I have no vacuum leaks, tried smoke and I tried carb cleaner, but I did notice that when I sprayed it into the intake the jeep bogged down, so I am guessing that means I am definatly running rich?
The egr block off plate is sealing well
I also pulled my computer down and pulled it apart, looks good as new inside, but I did notice two stray wires were there? No sure why or where they go, because I didn't see any on the harness cut any ideas where they go?
#58
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Carb cleaner bogging it down is not rich. It's a result of spraying carb cleaner into it.
#59
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Is there any way that the ignition timing can be adjusted?
I think I'm going to pull the cover and check the valve timing on of these days I get time
Last edited by noraayrrek; 05-01-2015 at 10:01 PM.
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You have a piece of vacuum line on the TPS tab, to get it within spec? My intermittent stalling was solved by adjusting my TPS on my "new" renix.
Fyi, my intermittent high idle was really bugging me after cleaning the IAC a few times. (on my other Renix). Finally cleaning it's connector better is what solved it. My thought is that since the socket deal faces up coolant, or water or something got, and stayed in there and did a number.
Fyi, my intermittent high idle was really bugging me after cleaning the IAC a few times. (on my other Renix). Finally cleaning it's connector better is what solved it. My thought is that since the socket deal faces up coolant, or water or something got, and stayed in there and did a number.
Last edited by DFlintstone; 05-01-2015 at 10:42 PM.