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  1. afiveo

    90 GT Running rich, backfiring?? Help!

    The fuel pressure reg. is newer. I cleaned the O2 connections under the car with brake cleaner and put new dielectic grease on them too. I am getting 11.5 volts on one and 11.7 on the other. If I check the voltage at the computer pins again, should the car be running or just key on. It should...
  2. afiveo

    90 GT Running rich, backfiring?? Help!

    The plugs are new, no miles, only trouble shooting. Fuel pressure is unknown. New fuel pump, new fuel filter, new 19 #injectors. How do I check pressure?
  3. afiveo

    90 GT Running rich, backfiring?? Help!

    What code is that? I don't now but I think I have earlier in this post. only 41 91 engine one now.
  4. afiveo

    90 GT Running rich, backfiring?? Help!

    I put everything back together. Also went ahead and put new valve cover gaskets on. I cleaned the salt and pepper 10 pins and ran a new vacuum line to the charcoal cannister. I also sprayed all elec connections with cleaner and applied new dielectric grease. I also set the TPS at .96 volts...
  5. afiveo

    1990 GT 10 pin jumpers??

    I have enough to plug them in without the extensions. It just seems like another area to possibly have a problem.
  6. afiveo

    90 GT Running rich, backfiring?? Help!

    I cleaned the ground and connectors at the back of the block and re-installed. still 11.5 11.7 volts at the O2 connections under the car. What is the solenoid that is attched to the charcoal cannister and has the wire running up to th injector harness? The vacuum lines that run to it are old and...
  7. afiveo

    90 GT Running rich, backfiring?? Help!

    I'm getting 11.7 volts at the O2 sensors on the white wires. My battery is low so I assume why it's not 12V.?? Why are there jumper connections at my 10 pin connectors at the back of the intake? I'm talking about the between the wiring harness connections. It seems to only extend then 4...
  8. afiveo

    1990 GT 10 pin jumpers??

    Why are there jumper connections at my 10 pin connectors at the back of the intake? I'm talking about the between the wiring harness connections. It seems to only extend then 4 inches or so. Is that all they are for?
  9. afiveo

    90 GT Running rich, backfiring?? Help!

    Thanks for the tips. This is on my "to do" list this weekend as well.
  10. afiveo

    90 GT Running rich, backfiring?? Help!

    Yes, I used new gaskets. I marked all the lines and their locations so I could re-install everything correctly. I am going to pull the upper again and see if something was missed. Thanks
  11. afiveo

    90 GT Running rich, backfiring?? Help!

    Thanks, I'll do that the first chance I get. Probably Friday or Sat.
  12. afiveo

    90 GT Running rich, backfiring?? Help!

    Thanks for the tips. Ground is hooked up. How do I check the O2's under the car? Do I unplug them and check the connectors with a voltmeter? Also I tried to unplug the 10 pins on the back of the intake and couldn't get them apart. They say push on the plug but I can't seem to unplug them.
  13. afiveo

    90 GT Running rich, backfiring?? Help!

    I guess when I get time I will pull the upper intake and look around. I'm running out of ideas.
  14. afiveo

    90 GT Running rich, backfiring?? Help!

    Edited **UPDATE** I located the Orange ground wire and it is connected.
  15. afiveo

    90 GT Running rich, backfiring?? Help!

    OK, I replaced the EGR Vacuum regulator. I also jumpered the connection while in test mode and the test light did flicker so the computer is sending the correct signal. Snap the throttle to 2500rpm, still no movement on the vacuum gauge. ?? I just bought a voltmeter and tested the O2 sensors...
  16. afiveo

    90 GT Running rich, backfiring?? Help!

    I connected my mitivac to the EGR diaphram and when I applied 5 in of vacuum, the engine stumbled and tried to stall. I could also see the diaphram moving. This tells me the EGR is good and the passage is clear. I then connected the mitivac to the vacuum line going to the EGR diaphram and...
  17. afiveo

    90 GT Running rich, backfiring?? Help!

    It turned out there was a chip in my computer. Hypertech. I removed it, disconnected the battery for 20 minutes. I warmed the car up and ran the test again. KOEO I got 11. Engine running I got 33 41 and 91 again. I'm going to go test the EGR and O2 sensors now. Also remove the smog crossover...
  18. afiveo

    90 GT Running rich, backfiring?? Help!

    The line from the charcoal canister to the hard plastic line (to fuel tank?) was not connected. I just went and removed the air box and found it. Would that have anything to do with the troubles or just solely for keeping the fuel fumes down?
  19. afiveo

    90 GT Running rich, backfiring?? Help!

    There is a hose about 6-8" long coming from the top of the charcoal canister that is not connected to anything. Is it a vent or something, or should it be connected to something.
  20. afiveo

    90 GT Running rich, backfiring?? Help!

    It has a panel filter in the stock air box.
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