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Author Topic: hic up  (Read 3828 times)

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lanulos89

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hic up
« on: February 24, 2007, 08:16:57 PM »
ok so about a month or two ago, my jeep started to hic up BAD. wehn i was accelerating it would just backfire and well hicup, like it wanted to stall or something. i ended up finding a bad plug wire and replaced that, and still did it. took off the dist cap and the electrode on the rotor was completely black so replaced that and the cap and it was good. also in the process my brother(ford mechanic) told me to do the fuel pressure regulator, but that did nothing but waste 65 bucks. well now its doing it again, not bad but it is deff happening. any ideas b/c i am dumbfounded?
 :brick:
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Offline Sidscan

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Re: hic up
« Reply #1 on: February 24, 2007, 10:48:06 PM »
lanulos,

I am definitely not a expert so that's why you'll get my guesses.  My neighbor had a similar problem with his stratus.  The wire to his CPS had a loose connection that would only show up when he drove it for a while.  He used some aluminum foil at the connector to tighten it.  He trouble shot that one for a several months. 

When I changed out my ignition to the PD stuff it seems to resolve a lousy idle problem I had.  When I pulled the coil wire I noticed that the coil side had gotten moisture to it at some point.   Here in Seattle we get our fair share of rain and I love to barrel through puddles.  I have gotten the check engine light after a couple of those and reset the PCM to clear it.  It would definitely do the hicup thing then. 

I think the PD was a good upgrade but definitely not light on the wallet.  Good luck.
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lanulos89

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Re: hic up
« Reply #2 on: February 28, 2007, 05:11:51 AM »
ran seafoam through the intake gas etc. did nothing.  i need more idea people, im stumped and its not stopping.
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Offline Jeffy

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Re: hic up
« Reply #3 on: February 28, 2007, 01:23:10 PM »
Did you try to recover any error codes in the PCM yet?  That's always priority #1.  If it doesn't tell you wan'ts wrong specifically, it will give you a general area to look.
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lanulos89

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Re: hic up
« Reply #4 on: February 28, 2007, 06:08:45 PM »
throws No codes!!!!  thats why im effing fed up with the effing thing.  whole igniton from coil to plugs is fine.  i have no ideas,  fuel injectors/ filter?????????  tps???????. cps????
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Offline Jeffy

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Re: hic up
« Reply #5 on: February 28, 2007, 06:18:08 PM »
Quote from: lanulos89 on February 28, 2007, 06:08:45 PM
throws No codes!!!!  thats why im effing fed up with the effing thing.  whole igniton from coil to plugs is fine.  i have no ideas,  fuel injectors/ filter?????????  tps???????. cps????

TPS will throw a code usually.  CPS will too.  Fuel filter won't.  I'm not sure if the Injectors will either.
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Offline Sidscan

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Re: hic up
« Reply #6 on: March 01, 2007, 04:10:53 PM »
Quote from: lanulos89 on February 28, 2007, 05:11:51 AM
ran seafoam through the intake gas etc. did nothing.  i need more idea people, im stumped and its not stopping.

I realize you did this to solve the problem.  Could doing this kill the O2?  I would think a code be thrown though.

Maybe take off the TB and really give it a good cleaning.  Might discover something. cheap try anyway.

Did you reset your computer at any point?  Could it have learned something stupid and is causing the problem?  Especially when you found the bad wire and stuff on your rotor.  Keep trying.
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Offline neale_rs

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Re: hic up
« Reply #7 on: March 01, 2007, 04:44:42 PM »
The fuel filter would be a good cheap thing to replace.  After that, maybe check the fuel pump.
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lanulos89

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Re: hic up
« Reply #8 on: March 01, 2007, 08:22:58 PM »
the stuff is o2 sensor safe, i have reset my computer on many ocassiions, i never tried looking in the tb,  i guess its worth a shot, ill do it morow at class.  so fa no1 has any ideas, if only it was obdII
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Tall Boy

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Re: hic up
« Reply #9 on: March 01, 2007, 10:16:25 PM »
When does it do it? Under load? Only when it is hot? When cold only? Both hot and cold? when a pretty girl walks by  :hitit: ? 

is the air filter clean? is the throttle body clean? how bout that butterfly valve? 
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Offline Jeffy

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Re: hic up
« Reply #10 on: March 01, 2007, 10:50:54 PM »
Resetting the PCM will not do any damage.  It will throw up a code since the battery will have to have been disconnected.  A Failing O2 sensor will through up a code for sure but it will be subtle.  The TPS will make the engine run like crap and cause a code immediately.  If the AIS motor is bad the engine won't idle right when it starts and will die if you're not on the throttle a bit.  You should be able to hear the fuel pump prime with the ignition on ON. A guess would be the CPS.  Unplug it and see if it throws a code or shows any difference.  You could use the same technique for the other sensors.
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"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

chrisfranklin

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Re: hic up
« Reply #11 on: March 02, 2007, 12:02:46 AM »
I had all sorts of problems with my engine when I had the rear-most bolt on my exhaust manifold shear off and cause a minor exhaust leak.  I had a hard time finding this exhaust manifold problem and it took a bunch of mechanics observing and one putting weight on the intake manifold to finally diagnose the leak. It never crossed my mind that the exhaust could be the cause of the engine's operating trouble, emissions difficulties.

I don't want to knock the PaceSetter Exhaust (course 1 or 2 of those have been known to leak), but if their are leaks anywhere from the manifold/header on back, that might be causing you a backfire problem.  It might also be caused by a leak on the intake side of the equation, but that's probably less likely and probably easy to spot, too. 

If the fuel filter doesn't do it (and I kind of doubt it will) maybe check out the exhaust, get a friend to lean on the intake manifold, do the soap bubble and water deal.  Good luck.   
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Offline Sidscan

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Re: hic up
« Reply #12 on: March 02, 2007, 12:17:55 AM »
A writeup I read said that during the seafoam process one would be able to find exhaust leaks.  The guy wrote that the excess liquid would seep through the gaps.  He even had pics where it had leaked on the ground and above.  Did you check around to see if there are leak marks.  The artical was on TJ Technical forum under Seafoam Mister I think. 
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christopher

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Re: hic up
« Reply #13 on: March 02, 2007, 11:08:09 AM »
.mine will do it mainly in third gear and up if you hold the throtlle steady say at 3500 rpms it will hick up or even seem like you are turning on and off the gas to the motor as quick as you can.   
« Last Edit: March 17, 2007, 09:32:34 PM by christopher »
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lanulos89

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Re: hic up
« Reply #14 on: March 02, 2007, 01:36:25 PM »
http://www.sierrajeep.com/trouble.htm

^that xplains it all chris

well went out the jeep at school,went to start it cranks slow as hell.  so i think its the battery, of course being at school no access to a jump pack, i had picked up a battery from ford where my bro works the night before, was a perfect battery for a diesel, i just forgot to take it out the night before.  so i hooked up jumper cables to both batteries turned it same thing slow, took out big 'ole hammer and wacked the starter a few times and started right up.  so i guess i need the jeep to start before i can worry about the hic up, too bad i dont have money for a starter, so for now ill just wack the starter when it acts up.  jeep=money pit
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