Rev Limiter Problem

[BenRM94]

Hey everyone, I have a 2001 Explorer 4.0 SOHC which came with a 5r55e auto transmission, but I swapped it to a manual transmission. I have a few small problems (mostly code/check engine light related). The biggest issue though is that the computer thinks I have the "auto" in neutral all the time, so the rev limiter is stuck at 3700 rpm :thumbdwn: Anybody know how to fool the computer to thinking it's always in drive so I can rev it to 6250?

...while we're at it, what wires control the reverse lights?

 

[albi1cnobi1]

Reverse lights are fed from pin 11 of the transmission range sensor connector.(pink/black)

 

[BenRM94]

Reverse lights are fed from pin 11 of the transmission range sensor connector.(pink/black)

Thank you

 

[2000StreetRod]

any jumpers?

Below is a diagram of the digital transmission range selector (DTRS) for your vehicle.

If you have no jumper to the GRY/RED connector pin then Drive should be indicated. Did you think it was necessary to jumper one of the pins (YEL/BLK or WHT/BLK) to GRY/RED in order to get the starter to engage? If so, I don't think that's necessary.

 

[BenRM94]

Wow 2000StreetRod that's perfect. We did jump two cables but I honestly forgot which ones. The wires we connected did allow the starter to crank, but unfortunately the rpm will only go up to 4700 (that's all that the sct programmer allows in neutral for whatever reason).

 

[2000StreetRod]

Manual trans calibration constants

If you have SCT's Advantage III software then you need to change the following Scalars under System Switches to convert from automatic to manual transmission:

Trans Auto Switch to 0
Trans Load Switch to 0
Trans Type to 0

If you perform the above then the PCM should ignore the DTRS position but you still need the jumper from PNK to TAN/RD to enable the starter. Be advised that unless you have wired in a clutch pedal position switch your starter can be engaged when the clutch is engaged.

 

[BenRM94]

Unfortunately I only have a tuner, not the software. What else could I do?

So I just checked, we did connect pin 12 (pink) to pin 10 (tan/red stripe) because it wouldn't start before that...

 

[2000StreetRod]

270 ohm resistor

You might try connecting a 270 ohm resistor between pin 2 (GRY/RED) and pin 3 (LT BLU/YEL). That should provide a Drive selection to the PCM. Make sure there are no other jumpers connected to pins 2, 3, 4, 5 & 6.

 

[BenRM94]

I'll give that a shot, thank you