TII issues - mostly engine
11-11-01, 05:47 AM
#1
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TII issues - mostly engine
I have a Stock '87 TII, here's the problems (please excuse any obvious ignorance):
1. When I rev to about 4000rpm+ it sort of studders, I supoose you might call it hesitation. It doesn't appear to effect performance much, but this effect increases with velocity/gearing. I just bought the thing, it has a new engine that with hoses that weren't hooked up correctly until recently. My dad says it spells a bit gasy driving behind it, but there is no smoke (normal?). The turbo seems to be working fine.
Before it had a big problem at 6k where it wouldn't produce any power or go any higher. In this case the problem was that the hoses were not correctly connected. Before the 6k problem was fixed, the car didn't seem to have the problem I've described.
2. I was driving on the highway and the car seems to have a bit of a vibration. At 70mph (120km/h) the steering wheel shakes. (doesn't have power steering) On different surfaces this increases/decreases, however the I thought on average it seemed to vibrate a bit too much. The wheel shakes back and forth, yet the direction of the car remains true.
Any suggestions? Thanks guys.
1. When I rev to about 4000rpm+ it sort of studders, I supoose you might call it hesitation. It doesn't appear to effect performance much, but this effect increases with velocity/gearing. I just bought the thing, it has a new engine that with hoses that weren't hooked up correctly until recently. My dad says it spells a bit gasy driving behind it, but there is no smoke (normal?). The turbo seems to be working fine.
Before it had a big problem at 6k where it wouldn't produce any power or go any higher. In this case the problem was that the hoses were not correctly connected. Before the 6k problem was fixed, the car didn't seem to have the problem I've described.
2. I was driving on the highway and the car seems to have a bit of a vibration. At 70mph (120km/h) the steering wheel shakes. (doesn't have power steering) On different surfaces this increases/decreases, however the I thought on average it seemed to vibrate a bit too much. The wheel shakes back and forth, yet the direction of the car remains true.
Any suggestions? Thanks guys.
11-11-01, 06:49 AM
#2
Senior Member
#1-- Tougher than #2. Could still be a misrouted/missing/broken vacuum line. Are there any mods to the car? Exhaust, intake??
#2-- Sounds like maybe a wheel out of balance at the minimum, maybe a warped brake rotor or the hub is not tight enough on the spindle. I'd guess it's not tie rod or ball joint as the tracking is ok. Try just switching the front and rear wheels or take them and get them re-balanced, the cost isn't that much. If switching fronts and rears makes the changes the problem (either better or worse) it's likely that the balance is off on one or more wheels.
I'd check is the free play of the wheel itself while the car is jacked up and you're planning to rotate the wheels. With the wheel mounted, put the car on stands and with hands at 12 and 6 o-clock, try to rock the wheel. If you have any play-- it will move and make a bumping sound. Repeat w/ hands at 3 and 9 o-clock. Do this for all 4 wheels. A problem here may just be the preload on the bearing (how tight that big nut is on the spindle), or if the car has a lot of miles, a worn bearing (generally they wear out if neglected-- ie. not greased recently).
Warped rotor also could cause the vibration, generally fronts are more prone. Take the wheel off and slowly rotate the rotor to see it it touches the brake pads only in a certain place. The rubbing sound of the pad on the rotor should be uniform all the way around a rotation.
Hope this helps!
Greg O.
#2-- Sounds like maybe a wheel out of balance at the minimum, maybe a warped brake rotor or the hub is not tight enough on the spindle. I'd guess it's not tie rod or ball joint as the tracking is ok. Try just switching the front and rear wheels or take them and get them re-balanced, the cost isn't that much. If switching fronts and rears makes the changes the problem (either better or worse) it's likely that the balance is off on one or more wheels.
I'd check is the free play of the wheel itself while the car is jacked up and you're planning to rotate the wheels. With the wheel mounted, put the car on stands and with hands at 12 and 6 o-clock, try to rock the wheel. If you have any play-- it will move and make a bumping sound. Repeat w/ hands at 3 and 9 o-clock. Do this for all 4 wheels. A problem here may just be the preload on the bearing (how tight that big nut is on the spindle), or if the car has a lot of miles, a worn bearing (generally they wear out if neglected-- ie. not greased recently).
Warped rotor also could cause the vibration, generally fronts are more prone. Take the wheel off and slowly rotate the rotor to see it it touches the brake pads only in a certain place. The rubbing sound of the pad on the rotor should be uniform all the way around a rotation.
Hope this helps!
Greg O.
11-11-01, 07:05 AM
#3
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Originally posted by 10TH_ANNIV_T2
#1-- Tougher than #2. Could still be a misrouted/missing/broken vacuum line. Are there any mods to the car? Exhaust, intake??
.
#1-- Tougher than #2. Could still be a misrouted/missing/broken vacuum line. Are there any mods to the car? Exhaust, intake??
.
I'll be looking into your suggestions in the very near future, thanks.
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