What happens if you unplug switch B? I’m assuming it has no issues then? Maybe trace the wires and see if there’s a short somewhere on that switch. Or replace the switch and see if that resolves the issue.
we have done that already. I have hopefully a car coming up to auction that is almost off the assembly line with my donor and a twin other than color. I have already traded an extra ECM over to it and borrowed to see if it is a ECM problem but that was not the answer as the problem continues. I have spent all day today going through the wiring harness and all wires are good and connections and plugs now have been cleaned with CRC contact cleaner and a fresh blob of dielectric grease applied.
So lets see if I can explain this a bit better if you drive like grandma the car will go to full throttle but you have to push slow. It will go there if you mash it to the floor but the ecm/bcm will only let it go at 30% that is in Reverse 1st and 2nd. When you hit 3rd there is a 1/2 second delay when you mash throttle but you dont have to hang on as it pushes you back into the seat very well. So now I have had on three occasions fix itself. 2 of them are my favorite round about close to work as we can really burn it good the other was a off chance of a green light getting off the freeway home and it is the same basic flat left turn you take in 2nd at about 2/3rd throttle with a bit of bounce as you go through. So like many I keep thinking poor connection or bad ground.
THINGS DONE TO CORRECT PROBLEM
In the beginning had clutch switch b codes replace and installed clutch switches
Then in Grants Pass Or. car would not start finished trip using wire to jump the relay to start. Found that the connections in the switch were loose so took plug apart carefully adjusted connectors reassembled and done a clutch relearn and problem fixed. Ran great until just a couple weeks back and then........
Now this spring discovered that exhaust had cracked at the flange a short chat with Adam and new muffler on its way. We done a up grade to 2 1/2 getting ready to do supercharger. well the new muffler did not have the O2 bung. Thought no biggy I will add one latter for the wide band and for now we don't need that one to run and had forgotten to shut the DTCs part down. Check engine light came on and bingo here is my Gremlin again.
So we have tried a different ECM have gotten a Tech 2 scanner with candi module. (most of which believe this or not is car find from my job) the only things I found that maybe had effect was that I had low voltage on the brake switch. took apart used finger nail file cleaned contact and then contact cleaner and dielectric grease. problem gone. the other is the coolant level low that I see. tossing over the idea of changing the temp sensor but it seems fine but......
I have taken every ground apart cleaned the pedal box now has a ground strap from the ground lug to the negative battery ground lug. I have installed a ground strap from engine to the ground lug under fuse box. problem still haunts me and just about to the end of this. If I can get the BCM from that car on monday may try that too but like I said if you slip clutch it works and if you disconnect the speed sensor it runs like a striped ape too. So with no codes and everything about the same just don't know where to look. I had the car tore down far enough to have the tunnel cover of looking over all parts of wiring doing tests and resistance and ...... I just have never had a problem be so evasive.
