Engine seems to be flooding at full power - JeepForum.com

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post #1 of 33 Old 07-12-2010, 11:28 AM Thread Starter
bmxrules39
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Engine seems to be flooding at full power

Well like the title says my engine seems to be flooding at full power.
If I floor it, it just bogs down and, sometimes even backfires.

Also when I'm accelerating it'll go in and out of power a bit.

Could this be yet another tps that needs replaced?

*update
so you don't have to read the whole thread
I have no CEL codes
I have swapped out the CPS and the downstream O2
I have unplugged the TPS, MAP, and the IAC, all of them throw a code and it runs way worse.
I have unplugged the up steam O2 which also makes it run way worse.

My idle is very rough, and if I accelerate any faster than a grandma on her way to church, it'll back fire out of my intake

any ideas are greatly appreciated


Last edited by bmxrules39; 08-19-2010 at 01:35 AM.
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post #2 of 33 Old 07-12-2010, 11:30 AM
GOLENJEEPTJ
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Are you speaking in general or have you already replaced it before?
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post #3 of 33 Old 07-12-2010, 12:33 PM Thread Starter
bmxrules39
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I have replaced it, about a year ago
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post #4 of 33 Old 07-12-2010, 02:12 PM
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Could just need a tune up.
First thing I'd check is the air filter...

It could also be that you should learn to not just stomp the gas pedal to the floor...
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post #5 of 33 Old 07-12-2010, 02:32 PM Thread Starter
bmxrules39
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I knew someone would tell me not to floor it, the fact is; it's a problem that didn't used to be there, and needs fixing. and further more, if I slowly ease into full throttle I will get the same response at the same point in the pedal position (about 3/4" before floored)

I have checked the filter, its fine.
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post #6 of 33 Old 07-12-2010, 09:57 PM Thread Starter
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Bump any sugestions?
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post #7 of 33 Old 07-12-2010, 10:09 PM
Jerry Bransford
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My first suspicion would be that the upstream 02 sensor is defective which will cause the computer to set the air-fuel mixture to full rich. Try disconnecting the upstream (just below the exhaust header) 02 sensor and see what happens.

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post #8 of 33 Old 07-12-2010, 10:44 PM
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I washed my engine and had the TPS go out? Engine off, Put a VOM on ohms, disconnect the TPS, touch two of the three pins, manualy operate the butterfly, the needle should rise and fall with the butterfly position smoothly
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post #9 of 33 Old 07-12-2010, 10:58 PM Thread Starter
bmxrules39
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Jerry, thanks for the suggestion. I unplugged it but it still acts like its flooding.

Lrod, I'll try and get my bosses VOM tomorrow and try that out.

Last edited by bmxrules39; 07-12-2010 at 11:33 PM.
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post #10 of 33 Old 07-12-2010, 11:39 PM Thread Starter
bmxrules39
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Now my jeep started having a really rough idle, and I got the CEL. I plugged it back in and its still doing the same thing does that mean anything, or do I just need to unhook my battery?
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post #11 of 33 Old 07-13-2010, 10:19 PM Thread Starter
bmxrules39
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Any other thoughts? It seems like at about 3000 rpms it starts acting up. Does that sound like it could the map sensor maybe?
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post #12 of 33 Old 07-14-2010, 12:54 AM
asknight
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Quote:
Originally Posted by bmxrules39 View Post
Jerry, thanks for the suggestion. I unplugged it but it still acts like its flooding.

Lrod, I'll try and get my bosses VOM tomorrow and try that out.
How does unplugging a faulty non-reading O2 sensor change anything?

My money is on TPS and/or O2 sensors.
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post #13 of 33 Old 07-15-2010, 12:30 AM Thread Starter
bmxrules39
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Quote:
Originally Posted by asknight View Post
How does unplugging a faulty non-reading O2 sensor change anything?

My money is on TPS and/or O2 sensors.
I'm not sure I understand your question. When i unplugged it, my jeep acted the same for about 2miles, then if you read futher it really started acting up, I plugged the O2 sensor back in, unhooked the battery, and now we're back to square one with the flooding
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post #14 of 33 Old 07-15-2010, 12:58 AM
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does it backfire out the exhaust or in the intake?
any black smoke out the exhaust?
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post #15 of 33 Old 07-15-2010, 01:05 AM
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Garage
Pull the codes
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