85 fuel pump????

Would some one please tell me what benifit there is to replacing my probably weak original 82 "Crossfire" fuel pump with a new Delco 85 "TPI" pump?

What is the part number of the best pump?
How to install? Is it a direct fit in place of the 82?

Trying to eliminate a hesitation and surge but do not want to make the problem worse.

Thanks for any input!
~Brian

I don't think you want to do that. The TPI pump is much higher pressure, I don't know if your fuel pressure regulator would handle that much. I suppose that it is also higher volume, but on a more-or-less stock engine I don't think you will get a benefit. I would look elsewhere for the problem. Be sure you are getting the proper pressure now.

YES, that is a very good up grade. But check your TPS (Throttle Position Senser) for correct out put voltage. Check these guys out for ANYTHING crossfire.
http://www.crossfire.homeip.net:81/cftest/
They are the masters of crossfire H.P.

I completely agree with Jim. The guys at the crossfire forum are the guru's for the cross fire setup.


Hi Jim

Thanks guys!

First off, Thank you for your advise and comments!

I went to the crossfire forum site and most agreed that before doing any other diag or repairs upgrade the fuel pump to the 85TPI unit first. I replaced the pump and in tank sock filter. I also replaced the original 02 sensor at the same time. The car started quicker than it ever has and a quick snap throttle test desplayed much better performance. Test drive was suprisingly better at any throttle/load! I drove the car to Lake Tahoe over the weekend and still noticed a minor surge at part throttle with the TCC fully locked up. I remember these early back pressure EGR valves causing surging problems when the back pressure was high or when the sensing part of the valve was defective or plugged with carbon. I ran it without EGR and the surge was almost completely gone and with out TCC or EGR it is gone. I suspect an ignition problem since when it surges the tach also gets a little eratic. EGR and TCC both put extra load on the ignition system as the engine is lugging at a very low RPM, much like powerbraking. I will probably replace the pickup coil and module next since they are both original and GM has had many problems with both. What do you think?


~Brian