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Idle problem

This is a discussion on Idle problem within the General Help forums, part of the LSx Technical Help Section category; Well, I say Idle problem. What happened is this: I took off the throttle body, to get the water pump ...

  1. #1
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    Idle problem

    Well, I say Idle problem. What happened is this: I took off the throttle body, to get the water pump out, then replaced the water pump. I stuffed some rags in the intake manifold because it got dark and the adhesive was going to need to sit overnight anyway. That was last night.

    Tonight I put everything back together and started up the car - it ran fine, except idle was around 800 rpm instead of the usual 600. Also, upon driving, it tends to keep revving around the same amount with the gas depressed a little, or not. Before, it would slow down pretty quickly when you let go of the throttle.

    To me, it seems like the throttle body may have just not gone back on right, because I reused the stock gasketing - maybe I need some permatex or something. I had to pull the EGR too though and it may not be in right. Just curious where I should start tomorrow. Damn it.

  2. #2
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    Throttle doesn't feel sticky or anything and I cleaned it up pretty nice yesterday so I don't think that's it... should probably mention I think the TB and EGR went on well too. Hope I didn't crack the intake manifold or anything but it was overheating before I replaced the water pump and i guess it could have melted a little or something. AIR blockoff plate on the driver's side leaks a little and the underhood was kinda smoky when it was running earlier, nothing thick, but it seemed to come from the back of the engine bay. That's about all I think; hope somebody has an idea.

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    checked the oil and coolant... isn't sucking coolant and there's no milk in the oil.

  4. #4
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    it sounds like it may be sucking some extra in around the tb/egr connections... i'll try the egr first but i wanted to know if anyone's had anything like this happen before. may be a vacuum leak, the hose going to the tb is displaying a little cracking and may be causing that. 190k :O

  5. #5
    Moderator Cutlass's Avatar
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    sounds like a small vacuum leak

  6. #6
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    replaced bad-looking hose... also tightened EGR connection but still having the problem. definite sucking sound coming from EGR hookup - I think it may be time to get rid of it altogether. i'll try to pull it off and put it back on when i get home but if the damn car still won't run right i'm gonna junk it.

  7. #7
    Smiles for 9.5 Years cammed goat's Avatar
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    Have you tried spraying soapy water around the TB/EGR connections to verify the leaks?

  8. #8
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    well i didn't do that but i pulled off the EGR about 20 mins ago, bent it so it was being torqued (1 screw design = teh retard...) 360 degrees instead of leaking. Now it idles right so I just need to fix the exhaust leaks (HEADER TIME!) and it'll be good to go Thanks ya'll.

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