TOP END REFINISHING

[Schrade]

Spun up again, primary free from binding, spinning like a top - with the restrictor gasket.

Road test for the cruise lope, and check the hesitation...

EXCEPT FOR A FRESH PROBLEM - BLINKING A/C CONTROL.



Recycled battery power, started up, no flashing, then flashing, now it's steady again.

No SES in DIC, no DataMaster codes.

Would this store as a CCM 'H' code, for display in LED dash?

Anybody?

[Franke]

Schrade, if you think you have a fault code check FSM page 1C1-2 diagnosis. Tells you how to check.

[Franke]

Schrade, how did the road test come out on the primaries only? Hesitation gone @1.5% idle?

[Schrade]

Originally Posted by Franke

Schrade, how did the road test come out on the primaries only? Hesitation gone @1.5% idle?

What's up Franke...

I did a few laps around my neighborhood, then 16 miles round trip to get Safety Inspection - that's a go, no problem.

Hesitation, observable under light throttle, is NOT gone.

The same hesitation that's evident at LIGHT rpm increase from idle is (and was before) evident in Reverse, and in Drive. Under light throttle, it is (as was before), evident as it shifts, and begins rpm climb again.

I cannot accept a vacuum problem, or mechanical problem. It HAS TO be electrical, related to the auto controller module, and the circuit that's singing, as TPS BEGINS range of motion (the 'singer', is in the tranny). Tranny controller diagnostic shows no tranny controller codes. Tranny shifts perfectly, and responds to changes in setting as well.

Everything NOW, with the 'Primary Only' gasket in place, is the same as it was before the plenum pull, with secondaries operational (except for the dirt).

And the Cruise lope, although I didn't engage Cruise, I'm sure is still there, and I'm certain it's also related to the hesitation / TPS circuit.

[Franke]

Did the HVAC issue go away?

[Schrade]

Originally Posted by Franke

Did the HVAC issue go away?

Yeah - had to be a fluke. Problems never 'go away' otherwise...

I'm gonna' get a vid of the singing TPS, and try to get feedback from TCI and RPM Transmissions.

[Franke]

Originally Posted by Schrade

Yeah - had to be a fluke. Problems never 'go away' otherwise...

I'm gonna' get a vid of the singing TPS, and try to get feedback from TCI and RPM Transmissions.

I'm not exactly sure of what you mean by "singing ckt TPS". Are you hearing something or reading something electrically near the trans?

[Schrade]

Originally Posted by Franke

I'm not exactly sure of what you mean by "singing ckt TPS". Are you hearing something or reading something electrically near the trans?

Yep - as the TPS goes range of motion, something in the tranny buzzes. Pitch changes in the buzz, as the TPS arm swings. ONLY Closed Loop too - has something to do with some circuit gettin' energized in CL.

When I un-hook the power to the tranny control module, it does NOT happen.

The shop that did the tranny said it was probably a shielding issue, related to Fluid Pressure Solenoid. Pffft. SOMEthing in the install in not 100% correct, but again, no trouble codes in the programmable tranny controller. It even calibrates for 0% TO, and 100% TO, in it's own Setup Wizard, on the handheld interface for the controller.




Probably time to let this thread drop; maybe resume the 'Hesitation' thread 1990 Throttle Hesitation, FROM which Darryl chopped off for THIS thread... Top end is done - pretty sure it's done right (except for getting the TB to Marc, and re-installed).

[Billy Mild]

Did you find your solution for the idle issue?

[Schrade]

Originally Posted by Billy Mild

Did you find your solution for the idle issue?

No I did not Billy (although it's not an 'idle' condition) - it's an issue that manifests @ 1.6 - 2.4% TO.

Marc H said the 'lope condition' that comes in @ 1.6% TO, and that continues from 1.6% - 2.4%, is a condition that "ALL 7,000 LT5's have".

I don't agree, but he knows more than me.

So until I can properly read AND write to the memory & calibration module, the 1.6 - 2.4% TO glitch is still there. Kind of a bitch at in-town driving / low throttle. But I know that all else is clean and in good burn order...

And the 2nd TB block when removed put back in about a 75 rpm swing, in DM, that was not there WITH the block. Block made rock steady 675 rpm's Open and Closed Loop.

When I get the hang of coding, I'll put the block back in to eliminate air leak in the TB 2nd holes, which is really negligible, as far as tuning.