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Type: Posts; User: 35thpartdeux

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  1. Replies
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    So all was well for 150 miles on the new computer...

    So all was well for 150 miles on the new computer learning session, then the same symptoms started showing up during regular cruising(random super rich conditions sometimes reaching 9.5:1 a/f) I...
  2. Just an FYI your O2 sensors are in front of the...

    Just an FYI your O2 sensors are in front of the cats so gutted cats won't trigger any lights.
  3. I would fix the maf and take care of...

    I would fix the maf and take care of sensors/vacuum leaks before doing a head gasket replacement. The milky look on the oil cap is most likely from condensation from the cold/humid condition outside....
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    My build was fairly "cheap" as far as SC builds...

    My build was fairly "cheap" as far as SC builds go. I used eagle rods and custom weisco pistons,had a shop put bigger valves/beefier springs and had Dalke spec a cam for me. I think all said and done...
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    So you mean just enough :cool:

    So you mean just enough :cool:
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    So much fun! I've been calling Jim bugging him...

    So much fun! I've been calling Jim bugging him about air/fuel troubleshooting for a while now lol. I think we might finally have it figured out. I realize that in saying this I will probably have to...
  7. I used the aluminum one from this site, it works...

    I used the aluminum one from this site, it works well for stock cars...
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    From what most on the site say, these engines...

    From what most on the site say, these engines like higher lift. I think most of those guys have modified heads though. Not sure how high of lift the stock heads can actually use, you'd have to ask...
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    The power band with stock heads drops off after...

    The power band with stock heads drops off after 5k rpm. You're probably going to need to up the boost quite a bit to get 12's on the stock long block. A cam & spring swap might help though.
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    After market valve trains can make a tick noise...

    After market valve trains can make a tick noise also.
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    I installed the computer I had sitting around, so...

    I installed the computer I had sitting around, so we'll see. While I was swapping the cover over from the old one I noticed that the new one appeared to only have needed one capacitor fixed by...
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    Unfortunately last time I tried to get it smoke...

    Unfortunately last time I tried to get it smoke tested I found that no local mechanic had a working smoke machine.... I've already checked the usual suspects for vacuum leaks thou and everything is...
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    My 1990 auto luckily doesn't have an egr and...

    My 1990 auto luckily doesn't have an egr and although it's a custom exhaust we reused the portion of the stock exhaust with the O2 bung in it, the other side is in the exhaust manifold itself.
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    I'm going to toss another set of O2's at it...

    I'm going to toss another set of O2's at it before anything. These random problems piss me off since I'm basically stabbing in the dark and can't even trust new parts. It almost makes me want to put...
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    So after driving 200 miles, I get 14.2 mpg. I...

    So after driving 200 miles, I get 14.2 mpg. I still see the air/fuel drop in the 9:1 range randomly at cruise. The trips start fine at 14-15:1 a/f then after a while it will drop slowly down in the...
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    At the motor I'm guessing 315. That 525 might...

    At the motor I'm guessing 315. That 525 might work for a few hundred miles though :cool:
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    Tossed on another set of Bosch O2's and it runs...

    Tossed on another set of Bosch O2's and it runs at 13:1 a/f on cold starts until operating temperature and 14-15 down the highway again so far. Not sure what cold start a/f should be since the lowest...
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    I wanted to add, I reset my computer today and...

    I wanted to add, I reset my computer today and the cold start went perfect, with only a few seconds of roughish idle then ran flawlessly. At least until interstate where it ran normally for 10 miles...
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    Thanks for the info, checked the coolant already,...

    Thanks for the info, checked the coolant already, I have to add every few months at most and only a little bit. It doesn't do this every cold start either which makes it frustrating. I'll try to...
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    Air/fuel problems

    Recently my car has developed a rich problem while cruising. It hits a 10:1 air fuel while cruising down interstate or in town. It's intermittent thus hard to diagnose, although it is doing it more...
  21. I can't remember for sure but I don't think it...

    I can't remember for sure but I don't think it was on the compression stroke.
  22. This may be a stupid question, but did you try...

    This may be a stupid question, but did you try cranking the car 3 consecutive times without putting the key in the off position? I had a similar problem and it turned out the timing was 180 off...
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    So bad even the plastic rusts lol.

    So bad even the plastic rusts lol.
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    He's XR7Dave here.

    He's XR7Dave here.
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    David Dalke can put the tune on a chip through...

    David Dalke can put the tune on a chip through the mail if you tell him your list of your mods. If you do go to a shop make sure they use SCT to tune it.
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