Mysterious vibration at highway speeds
#1
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Mysterious vibration at highway speeds
I made the worst mistake a man can ever make with his car, I let a friend borrow it for a day, my 1990 RX-& GTU. It has been returned to me with a very harsh vibration at highwat speeds. After much interrogation, he admitted to spraying something called "JB Blaster" down into my engine to remove the carbon. the engine also feels a little weak at highway speeds too.
I haven't moticed any smoke, white,black, or otherwise, he said that he saw a lot of black smoke come out of the engine after the application, and that this Blaster stuff is supposed to do that, releasing all of the carbon from the engine. If I am not mistaken, my car has 3 catalyctic converters, correct? Mt theory is that he has either fouled the hell out of my plugs, or clogged my cats to the point of no return.
Any thoughts? I swear to God am I about to ***** a gold brick.
I haven't moticed any smoke, white,black, or otherwise, he said that he saw a lot of black smoke come out of the engine after the application, and that this Blaster stuff is supposed to do that, releasing all of the carbon from the engine. If I am not mistaken, my car has 3 catalyctic converters, correct? Mt theory is that he has either fouled the hell out of my plugs, or clogged my cats to the point of no return.
Any thoughts? I swear to God am I about to ***** a gold brick.
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well, I have no idea what your friend did, I would go over and check everything in your engine area. Do a tune-up and if possible do a compression check.
Followed by killing your friend
Followed by killing your friend
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#11
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Urge to kill rising!
If a seal is damaged, I am going to burn him to death on my crippled engine!
I'll go get some new plugs and have the dealer do a compression check tomorrow. Wish me luck.
If a seal is damaged, I am going to burn him to death on my crippled engine!
I'll go get some new plugs and have the dealer do a compression check tomorrow. Wish me luck.
#13
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Just checked the plugs. As I suspected, 2 of them were toast. They're not supposed to have all kinds of soot filling up their grooves and electrodes, are they now?
I do not condone violence, but by the time you read my next post, I will have smacked him in the back of the head at a very inopportune moment, like when he's drinking a beer or something.
Edit: I am so pissed that I can't even spell!
I do not condone violence, but by the time you read my next post, I will have smacked him in the back of the head at a very inopportune moment, like when he's drinking a beer or something.
Edit: I am so pissed that I can't even spell!
Last edited by RotaryXperiment; 07-05-03 at 08:16 PM.
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Originally posted by walken
yeah, when you clean the carbon out, you should use old plugs.
yeah, when you clean the carbon out, you should use old plugs.
I haven't got the new plugs yet to replace the nasty ones, so I do not yet know if that is the only problem, but would the vibration between 2000 and 3000 rpm be caused by fouled plugs?
I just drove the car again, and i see no smoke, and it drives like a champ above that range. The idle is smooth as silk.
#17
I don't let anyone drive my car with the exception of my dad and brother. Both who could write me a check for the value of the car on the spot if they did any damage and both know more than me about cars.
Friends? NEVER, my girlfriend of 2 years has never even been in the driver seat of any of my 7's.
Sorry about the rant.... Hope everything turns out ok.
Friends? NEVER, my girlfriend of 2 years has never even been in the driver seat of any of my 7's.
Sorry about the rant.... Hope everything turns out ok.
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Originally posted by yearrgh
where is the vibration coming from? the engine or does the steering wheel shake?
where is the vibration coming from? the engine or does the steering wheel shake?
#20
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mmm, I've got some vibrations above 60mph that origin from the exhaust. I've cut most the hanger, and was to lazy to buy some so hardwelded. Big mistake btw, but to lazy to fix it.
I dunno, just hope he didn't hit a curb or some stupid crud
I dunno, just hope he didn't hit a curb or some stupid crud
#21
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My ex-gf got to drive my car once. I was trying to teach her how to drive a stick. Gotta love families that have all automatics to drive.
She caught on pretty quick, but had a habit of shifting into 2nd at 5k rpm. Little burnout and she would jam the brakes and stall it out.
I showed her later what happens when you drop 1st gear at 5500 rpm. She understood perfectly what happens.
Oh well, good luck with getting the thing working again.
If it turns out to be a U-joint, PM me. I have replacements for sale.
She caught on pretty quick, but had a habit of shifting into 2nd at 5k rpm. Little burnout and she would jam the brakes and stall it out.
I showed her later what happens when you drop 1st gear at 5500 rpm. She understood perfectly what happens.
Oh well, good luck with getting the thing working again.
If it turns out to be a U-joint, PM me. I have replacements for sale.
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Originally posted by Kenteth
mmm, I've got some vibrations above 60mph that origin from the exhaust. I've cut most the hanger, and was to lazy to buy some so hardwelded. Big mistake btw, but to lazy to fix it.
I dunno, just hope he didn't hit a curb or some stupid crud
mmm, I've got some vibrations above 60mph that origin from the exhaust. I've cut most the hanger, and was to lazy to buy some so hardwelded. Big mistake btw, but to lazy to fix it.
I dunno, just hope he didn't hit a curb or some stupid crud
#23
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Absolute idiot friend aside, there is an off chance that the PB Blaster and vibrations are not related. If you only feel vibration at highway speeds (over 50 mph or so), it may be something as simple as a wheel balance. He may have lost a weight. You would feel vibration on wheel, seat etc. that is releated more to MPH than to RPM.
If that is the case, have the wheels balanced before panic sets in on mucked up seals.
If that is the case, have the wheels balanced before panic sets in on mucked up seals.
#24
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I had a mysterious virbration in my olds AWD talon. At highway speeds when you got on it, it was shake like it was trying to make a talon milkshake. Get off the throttle and it was perfectly fine. Turned out to be the needle bearings in the CV's going bad and allowing the shaft to pop off to one side. Anything over 40mph is something not being balance, wheel out of round/not balanced, CV's, driveshaft..etc.
The feeling of less power could also be do to the weather. I know it's been humid as hell up in NW ohio..so factor that in too. Other then that, check the plugs. If it starts fine and seems to idle pretty smooth, I'd say your compression is probably ok.
The feeling of less power could also be do to the weather. I know it's been humid as hell up in NW ohio..so factor that in too. Other then that, check the plugs. If it starts fine and seems to idle pretty smooth, I'd say your compression is probably ok.
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I can't deny it now. It is definitely drivetrain. I guess I coudn't tell before because I was too busy freaking out to notice, but the vibration is at all speeds, and is really not rpm dependent. It just gets worse as the speed increases. It got so bad this morning when I was out on the highway that I pulled over to check the car. i can rev the engine in neutral all day long without a single vibe. I changed the plugs anyhow, since it was up for that anyhow.
Probably the driveshaft. The change in my center console jiggles like a fat lady's ***, while the change near my shifter barely jingles at all. The vibe is coming from the mid/rear. I guess it is the driveshaft after all.
Probably the driveshaft. The change in my center console jiggles like a fat lady's ***, while the change near my shifter barely jingles at all. The vibe is coming from the mid/rear. I guess it is the driveshaft after all.