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#1 |
Registered Member
Join Date: Aug 2001
Location: Citrus Heights, CA
Posts: 74
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![]() Hi everyone, I have an annoying problem. I have a 1990 Lx 5.0. Sometimes, if I accelerate hard for a quick second, I hear a knock in my suspension. It also happens sometimes when I shift from first to second or second to third - when I put the clutch in. There are two different knocks that I hear: The first is when I am accelerating and the second is when the car is slowing down but in gear still. For instance, if I am in first and gas it, I will hear and sometimes feel something moving. At 3000 rpm, if I take my foot off the gas, the engine slows the car down (of course) but I hear a little different sound, like the first was stress being put on (or off) the suspension and the second was it moving back. I already checked the tranny and motor mounts and shocks. I also changed some of the bushings that looked bad and made sure the k-frame bolts were tight, but I still have the problem. Any help would be greatly appreciated as I am at a loss of what to do now.
Thanks in advance, Josh |
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#2 |
2 Stangs in the Stable
Join Date: Apr 2002
Location: Baytown, TX
Posts: 1,209
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![]() Check your rack and pinion bushings and bolts.
__________________
'90 GT Under construction Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!! ![]() ![]() 04 F-150 STX 4.2L 5 spd Rice Haters Club Member #128 |
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#3 |
Registered Member
Join Date: Jul 2000
Location: Norman, Oklahoma, USA
Posts: 597
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![]() rack and pinion? i don't quite get why you think that would do anything when you accelerate or decelerate. Sounds like maybe a U joint problem. Is it coming from the front of the car or back? Could be pinion snubber making noise, could be quad shocks making noise, could be a rear control arm bushing that's messed up.
__________________
Michael Black QuantumMotorsports Norman, OK 1984 LX Hatch 306 w/ TRW forged flat toppers, Comp Cams Magnum 292H, GT40P heads w/ 3 angle valve job, .550 lift springs, Angus Racing Roller Rockers, Weiand Stealth Intake, Holley 4150 650cfm carb, MAC 1 5/8 Long Tubes, Single Chamber Flowmasters, 91' T5 w/ Pro 5.0 shifter, Turbo Coupe 8.8 Rear w/ 3.55 gears, QA1 Motorsports tubular K member, no interior except steering wheel and seat. Coming soon: 6 or 8 point cage, Fuel Cell, Weld Draglites |
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#4 |
Registered Member
Join Date: Aug 2001
Location: Citrus Heights, CA
Posts: 74
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![]() The noise is definitely coming from the front. I heard that the Lx 5.0s had the same suspension components as the 4 bangers. Could this mean that the U joints may need to be replaced as they were made originally for a 4 cyl.? Is there an easy way to diagnose this? Now that I think about it, I first started hearing the noise when I took a sharp left turn. But now it happens all the time. When I first heard the noise, could that be the rack and pinion bushings and bolts? And if it is, how would that explain the noises during acceleration/decceleration I am hearing now?
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#5 | |
2 Stangs in the Stable
Join Date: Apr 2002
Location: Baytown, TX
Posts: 1,209
|
![]() Quote:
__________________
'90 GT Under construction Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!! ![]() ![]() 04 F-150 STX 4.2L 5 spd Rice Haters Club Member #128 |
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#6 |
Registered Member
Join Date: Aug 2001
Location: Citrus Heights, CA
Posts: 74
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![]() Thanks for all the suggestions. I will check both the U-joints and the rack and pinion tomarrow. I will let you guys know what I find out, if anything.
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#7 |
Registered Member
Join Date: Jul 2000
Location: Norman, Oklahoma, USA
Posts: 597
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![]() when you accelerate or decelerate both front wheels would move up or down about the same amount, which wouldn't really cause the rack to move. Anyway, the U joints probably aren't it if it's coming from the front. If it first happened when you went around a corner it could be your sway bar bushings or endlinks. One endlink broke on my cougar once and it made a god aweful racket when I went around corners one direction. Check that out. Also could be balljoints, strut mount bushings, A arm bushings, just about anything. Tell us what you find out.
__________________
Michael Black QuantumMotorsports Norman, OK 1984 LX Hatch 306 w/ TRW forged flat toppers, Comp Cams Magnum 292H, GT40P heads w/ 3 angle valve job, .550 lift springs, Angus Racing Roller Rockers, Weiand Stealth Intake, Holley 4150 650cfm carb, MAC 1 5/8 Long Tubes, Single Chamber Flowmasters, 91' T5 w/ Pro 5.0 shifter, Turbo Coupe 8.8 Rear w/ 3.55 gears, QA1 Motorsports tubular K member, no interior except steering wheel and seat. Coming soon: 6 or 8 point cage, Fuel Cell, Weld Draglites |
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#8 |
Registered Member
Join Date: Aug 2001
Location: Citrus Heights, CA
Posts: 74
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![]() I raised the stang up today and took off the passenger side front wheel. Everything looked good until I noticed that the spring saddle is in about twenty little pieces. This MIGHT be a problem, what do you guys think?!!!. I usually work on my car myself, and I am picking up a spring compressor today from my friend for my mach 1, but is this a job I should just let a shop do? If so, how much would it cost if I brought them the parts?
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