Dive right when let off the gas

Tiny
JIMSWAN
  • MEMBER
  • 1997 CHEVROLET LUMINA
  • 180,000 MILES
What would cause a 1997 chevy lumina car to dive to the right when I let off the gas and dive to the left when I step on the gas I have replaced the rack & pinion inner and outer ti rods ball joints if I had money I would pay but I am very poor and ony have a small disability check to get by on
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Friday, January 20th, 2012 AT 11:14 PM

5 Replies

Tiny
JIMSWAN
  • MEMBER
The brakes are new allignment has been done it is not pulling it is diving or shooting off to the right when I let off the gas and to the left when I step on the gas
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Saturday, January 21st, 2012 AT 8:19 AM
Tiny
CARADIODOC
  • EXPERT
Did this start after the rack was replaced? If so, was the engine cradle lowered to do the replacement?
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Sunday, January 22nd, 2012 AT 8:57 AM
Tiny
CARADIODOC
  • EXPERT
Also, do you have a printout from the alignment?
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Sunday, January 22nd, 2012 AT 8:57 AM
Tiny
JIMSWAN
  • MEMBER
No it stated befor the rack & pinion was done that's why it was replaced and yes the motor was lowered the by the mesurements that is called for to be lowered
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Sunday, January 22nd, 2012 AT 7:53 PM
Tiny
CARADIODOC
  • EXPERT
A tire pull can cause that problem. One way to find that is by switching the two front tires side-to-side. If it pulls the other way but there's no vibration, it can just be different rolling characteristics. You can usually get that problem to go away then by switching just the two left tires or two right tires. If there is a vibration or shimmy in the steering wheel, suspect a broken belt in one of the tires.

Worn lower control arm bushings can cause a pull by moving around and causing a change in alignment angles. That should have been found during the pre-alignment inspection or the post-alignment test drive. The problem certainly should have been noticed by the alignment mechanic.

The rack and pinion won't cause your problem unless it is loose on its mounts. A worn inner or outer tie rod end will let a wheel turn toward the center of the car on acceleration and away when braking. The entire rack assembly is not replaced to replace a worn inner tie rod end.

A real elusive cause of this problem that only affects GM cars is the removal of the cross member. Experienced mechanics will use spray paint to make "witness" marks so the cross member is bolted back up in exactly the same orientation. If that is not done, and it is moved to either side, that will move the lower control arms, ball joints, and bottoms of the struts sideways. That changes "camber" which is adjustable, or can be made adjustable if the struts are still original, but it also changes "steering axis inclination", (SAI). SAI is the inward tilt of the struts as viewed from the front of the car. There is no spec given on the alignment computer. All that is important is it must be the same on both sides. If it is not, even though camber can be corrected, it will leave the car very miserable to drive with its darting back and forth. That's why you need to look at the alignment printout.
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Sunday, January 22nd, 2012 AT 8:33 PM

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