I have a built 86 350 TPI w/ a custom TPI Specialties chip. When I had the chip burned I was still running my EGR, but I have since unhooked it. TPIS told me to unhook it b/c of a surging idle problem I had. They said it wouldn't hurt peformance at all and that they would just have to reburn my chip to keep the SES light from coming on. Well after I unhooked the EGR the car ran great and I got NO SES light. Could this be hurting performance at all??? Sometimes if I am on the highway for a long time w/ the a/c on I do get a code 32 but the engine temp is also high. Please give any input. Thanks

 

First, on the stock eprom, the EGR is turned off when the car is idling. So I am a little loss on their suggestion.

As for the code 32, it occurs after driving on the Highway (part throttle cruise) after a period a time when the EGR is not functioning properly.

To fix PROPERLY, you need to do 2 things, 1) turn off the diagnostic and 2) disable the EGR by setting the MAT Counts to a very high number around Decimal 253 (or Hex x'FD).

As for being able to adjust a TPIS eprom, I believe they have modified it so you cannot use a standard BIN editor. Best to contact TPIS about it.

 

Thanks for the help. The car didn't really surge at idle, just at really low RPM driving when held at a constant speed. So do you think this could be hurting peformance???

 

Depends if it is going into "Fail Safe Mode" or not. EGR operation is usually a "non-issue" in WOT as the EGR is turned off.

 

Without knowing what they have written in their chip, it's anyones guess what you have.
That's the trouble with buying things that you can't look at.

At a min. it sounds like their EGR part of their calibration was wrong, makes me wonder if anything is right.

When you buy a chip from someone, all you get are guestions.

That's why this board is here, for folks to design their own calibrations. So they know it's right, or how to make it right.