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  1. capt_yoda

    Power surge at 2% to 90% throttle..

    Guess I will check that then.. but will have to wait till next weekend, being it's my only ride right now..lol.. Anymore ideas between now and then will be greatly appreciated and thank you all for your thoughts and ideas.. keep em coming..
  2. capt_yoda

    Power surge at 2% to 90% throttle..

    And those EGR ports were cleaned before I put the new EGR on, but the where the ports meet, head to intake, the only way to check is to remove the intake to see if there clogged.. and I haven't tried that... but has anyone heard of that, and would it cause my symptoms?
  3. capt_yoda

    Power surge at 2% to 90% throttle..

    That ended with the 1st Gen HEI... I did check the advance while using the timing light and scanner, it's advancing with'in normal limits while loading rpms...
  4. capt_yoda

    Power surge at 2% to 90% throttle..

    The distributor has very little play under the cap, (turning the rotor has very little movement), the retainer is tight and number 1 is pointed towards the number 1 cyl.. again, timing is near perfect, if not perfect..
  5. capt_yoda

    Power surge at 2% to 90% throttle..

    The injector spray is a nice cone shape, no dribbles, or partial sprays... and both looked good across the rpm band from idle to 3500...
  6. capt_yoda

    Power surge at 2% to 90% throttle..

    The engine only has 85k miles on it, but original motor from 87'... the compression check was normal for all 8cyls.. that was done 4 days ago.. and the Vacuum test was good, not great, but satisfactory level and it was not erratic, it was steady through all rpms...
  7. capt_yoda

    Power surge at 2% to 90% throttle..

    The only thing I do know, is it idles great, and it will run like a scalded ape when throttle is to the floor.. but in between 2%-90% throttle, it's terrible... I have heard different suggestions from other forums... such as: Intake has clogged EGR ports that connect to the head.. A failing Fuel...
  8. capt_yoda

    Power surge at 2% to 90% throttle..

    Been mechanic'ing on Chevy for a lot of yrs, haven't miss placed wires according to firing order since I was a teenager..lol, but I did double check... and as for the CAT, it's a high Flo I replaced last year, had to trash that pancake OE cause their horrible for restriction..
  9. capt_yoda

    Power surge at 2% to 90% throttle..

    Never had that happen before, nor this issue I'm having now and I've had 5 other TBI equipped vehicles.. As stated earlier, there is no stored codes, self diagnostics check out with no problems... SES Lights up when turning on the key... The ECM and Prom are both new... Scanner check was good...
  10. capt_yoda

    Power surge at 2% to 90% throttle..

    I had too much new stuff to post it all together, but I had checked and replaced the EGR valve last year.. it is functioning correctly... melted vacuum line from MAP sensor? How did that happen, unless the line was against the EGR?
  11. capt_yoda

    Power surge at 2% to 90% throttle..

    The problem has been there since I bought the truck 2 yrs ago... but it had many other problems before I got it dialed down to this last problem... it wasn't this bad till a week ago, it was intermittent and would come and go once in awhile, but now it is constantly doing it... making it...
  12. capt_yoda

    Power surge at 2% to 90% throttle..

    Also, all Vacuum lines have been replaced and routed correctly... same for fuel lines... and fuel filter...
  13. capt_yoda

    Power surge at 2% to 90% throttle..

    As for MAP sensor, the scanner did show it was a little low, but not enough to cause this.. and not low enough to throw a code either...
  14. capt_yoda

    Power surge at 2% to 90% throttle..

    Timing is dead on... and no SES codes, it has had 3 months to store codes since I last disconnected the battery... also had it connected to scanner 3 days ago and all sensors are communicating with ECM without issues..
  15. capt_yoda

    Power surge at 2% to 90% throttle..

    Yes, that's accurate, although I have already replaced it as well, along with the IAC, however none of those were related to this problem but other problems when I first got this truck..
  16. capt_yoda

    Power surge at 2% to 90% throttle..

    My 1987 Chevy R20, 350ci, TBI has no power and surges after 2% throttle and doesn't gain power back till after 90% throttle. The TPS is new and checked with multimeter, no dead spots.. New Fuel Pump and tested at the back of the TBI@14psi while running, 12psi@load.. New Fuel Regulator, New Fuel...

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