Surging at Steady RPM
10-16-02, 07:51 PM
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Surging at Steady RPM
The surging starts after the car warms up and has been driven 10-15 miles. Then after surging for a few miles the engine light comes on and then car runs fine. It was a code 17, so I replaced the O2 sensor. But the car still surges and then light comes on again with same code. I replace the O2 sensor again with another brand new Bosch with the single wire. Still have the same problem. In the manual under code 17 everything points to the O2 sensor. The car runs fine with the light on, but some times the light won’t come on, on short trips. I have done several searches. All other code 17 were fixed with a new O2 sensor. Anyone every had a problem the Bosch single wire? Anyone have any other ideas?
10-16-02, 08:25 PM
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I think you'd have to start thinking about a broken wire, or bad connection somewhere. The O2 sensor seems to have it's own ground at the back of the UIM. Have you tried cleaning that connection, and making sure there's a good engine to chassis ground?
No reason to say that's your problem. Just trying to throw out some ideas. No way you could have that many bad O2 sensors.
Good luck,
No reason to say that's your problem. Just trying to throw out some ideas. No way you could have that many bad O2 sensors.
Good luck,
10-17-02, 09:42 AM
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Done that
Originally posted by dvandit
I would make sure that your exhaust is properly grounded. From the factory there is a braided ground wire from cat / cat-back pipe joint to the chassis.
I would make sure that your exhaust is properly grounded. From the factory there is a braided ground wire from cat / cat-back pipe joint to the chassis.
Last edited by RaceReadyRX7; 10-17-02 at 09:45 AM.
10-17-02, 09:44 AM
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Originally posted by RaceReadyRX7
Right before this started I had the cat back off. After I replace the first O2, I checked the ground and found it loose. So, I replace it again. When I found that loose ground I thought I had found the problem. Unfortunately that was not the problem. Although I did buy 2 new ground straps. I'm going to add them to the exhaust system and motor tonight.
Right before this started I had the cat back off. After I replace the first O2, I checked the ground and found it loose. So, I replace it again. When I found that loose ground I thought I had found the problem. Unfortunately that was not the problem. Although I did buy 2 new ground straps. I'm going to add them to the exhaust system and motor tonight.
I think it is a ground problem. Everybody needs to add grounds anyways, so add your's and get back to us.
10-17-02, 09:50 AM
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Originally posted by Street King
I think it is a ground problem. Everybody needs to add grounds anyways, so add your's and get back to us.
I think it is a ground problem. Everybody needs to add grounds anyways, so add your's and get back to us.
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10-17-02, 10:11 AM
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Originally posted by RaceReadyRX7
Do you think a bad ground will ruin a brand new O2? I don't know if Napa will replace it for me again.
Do you think a bad ground will ruin a brand new O2? I don't know if Napa will replace it for me again.
10-18-02, 09:51 AM
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Originally posted by Street King
I think it is a ground problem. Everybody needs to add grounds anyways, so add your's and get back to us.
I think it is a ground problem. Everybody needs to add grounds anyways, so add your's and get back to us.
10-20-02, 01:19 AM
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Just go to any auto parts store and buy a uninsulated grounding strap, 8" or 12" and bolt from motor to body. Just make sure you scrap off the paint where ever your grounding.
Last edited by RaceReadyRX7; 10-20-02 at 01:22 AM.
11-08-02, 06:29 PM
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just go to any auto parts store and buy a uninsulated grounding strap, 8" or 12" and bolt from motor to body
11-11-02, 09:52 AM
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I have 1 from the "Y" pipe to the right fender, a bolt that hold the fan relays in place. The second from the UIM to the fire wall, the bolt that hold the map sencor in place. These may not be the best places, they were the easiest for me. Just back sure your connecting bare metal to bare metal.
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