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 Engine Noise Question
#790589
02/19/07 01:22 AM
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Joined: Mar 2006
Posts: 73
OP
Getting the Wheeling Fever
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I noticed recently that when my jeep is under a load it sounds like it's missfiring when I try to accelerate quickly. It sounds like my lifters (i think it's this) is clicking. It sounded at first like an exhaust leak but it only does it when i'm driving and I really try to accelerate. Doesn't do it when it's just sitting still though and I rev the engine. How can I fix this, or does it need to be adjusted is all? Any help is apperciated, thanks.
- Kotrin
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 Re: Engine Noise Question
[Re: Kotrin]
#790590
02/19/07 02:50 AM
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Joined: Oct 2003
Posts: 7,768
Web Wheeler
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It would be nice to know what we are working on. Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />
professional bovine relocation specialist
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Re: Engine Noise Question
[Re: BigJim]
#790591
02/19/07 03:03 AM
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Joined: Mar 2006
Posts: 73
OP
Getting the Wheeling Fever
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Doh, been a long weekend. It's a 98 TJ Wrangler 4.0L with 70k miles on it. It's had regular oil changes and fluids recently changed.
- Kotrin
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Re: Engine Noise Question
[Re: Kotrin]
#790592
02/19/07 08:00 AM
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Joined: Sep 2005
Posts: 1,087
Body Damage is Cool
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I'd do a quick check on the timing first, in particular the advance settings.
1977 CJ-7, fiberglass body, AMC 360 w/ headers, DUI ignition, Edelbrock intake and Holley 4150 carb, TF999, Dana 300, 4.56 gears lockers, York air comp, 4" susp lift, 2" body lift, BFG 35" M-T tires, Megashifter, AGR pump & box, REP8000 winch.
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Re: Engine Noise Question
[Re: BobRowe]
#790593
02/19/07 07:15 PM
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Joined: Jul 2006
Posts: 278
Mudrunner
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Take a quick looksy at the head and the manifold and exaust.
jmho
C.
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Re: Engine Noise Question
[Re: cjensen]
#790594
02/20/07 03:25 AM
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Joined: Mar 2006
Posts: 73
OP
Getting the Wheeling Fever
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Take a quick looksy at the head and the manifold and exaust.
jmho
C. What should I be looking for. I've felt for a leak and didn't feel one and it's wierd if it's sitting I rev it up and I dont hear it, only when i'm driving <img src="/forums/images/graemlins/frown.gif" alt="" />
- Kotrin
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Re: Engine Noise Question
[Re: Kotrin]
#790595
02/21/07 04:42 PM
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Joined: Mar 2005
Posts: 88
Getting the Wheeling Fever
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sounds to me that we have the same issue... except mine is with my 1-year old mopar fuel injection kit on an '87 4.2.
in my case, under heavy acceleration, there seems to be a "chatter" noise @2100+ rpms. worked on the timing and i still have the noise. i know it has to be from the engine/mopar kit because it wasn't there prior to the kit installation.
i'm still trying to narrow this noise down.
4.2 '87 yj, 263,000 miles, mopar mpi, 33" mud bfg, skyjacker 4", 3.73 gears, arb lockers-f and r., tom wood's 2.07 shaft conversion, tom wood's hd driveshaft, magnaflow/custom exhaust, 4wd bumper/swing-out tire carrier
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Re: Engine Noise Question
[Re: bhartwell59]
#790596
02/21/07 05:18 PM
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Joined: Oct 2003
Posts: 7,768
Web Wheeler
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You guys do know that injectors do make a noise everytime they close? I betcha you are hearing injector noise and worrying about it. My wifes suburban clicks so loud you'd swear it was lifters. But it is just the injectors doing their job. Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />
professional bovine relocation specialist
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Re: Engine Noise Question
[Re: BigJim]
#790597
02/22/07 04:02 PM
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Joined: Mar 2005
Posts: 88
Getting the Wheeling Fever
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ok, but wouldn't that happen all of the time? at idle and normal driving?
in my case, the noise makes quite a racket, at the 2100+ rpm point.
i'm stomped.
4.2 '87 yj, 263,000 miles, mopar mpi, 33" mud bfg, skyjacker 4", 3.73 gears, arb lockers-f and r., tom wood's 2.07 shaft conversion, tom wood's hd driveshaft, magnaflow/custom exhaust, 4wd bumper/swing-out tire carrier
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Re: Engine Noise Question
[Re: bhartwell59]
#790598
02/22/07 04:28 PM
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Joined: Oct 2003
Posts: 7,768
Web Wheeler
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Well it could be valve clatter. Put a light on it and slowly raise the rpm while watching the timing change. See when the centrifical and when the vacuum timing comes in and what the timing is around the 2100 mark. Could be you need a different set of springs or some spring dialed into the vac advance. Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />
professional bovine relocation specialist
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