ok to start off with my jeep is running on ms. i hooked up the tach signal wire to the negative on the coil and i am getting a tach reading but it is way off. tuner studios shows idle at 750-800 and it feels like that, but the tach says 1300 rpm. my rev limiter is set at 5300 and when i feel it hit the tach show 7000+ rpm. i know the pcm supplied the tach signal and i am wondering if i just nee to buy an aftermarket tach or what?
problem 2. the speedometer. i have 8 volts running to the sensor and the sensor grounded where the cluster is grounded (on block) with it hooked up i still get no mph but the weird thing is when i free rev or drive it the speedo jumps randomly with the rpm, but only when the speedo is hooked up. i already cleaned the crap off of the solder joints on the back of the cluster and at the connector, didnt change much. any ideas?
tach signal, speedo problem
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- Vehicle Year: 1989
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- Vehicle Model: comanche
- Location: dyess afb texas
tach signal, speedo problem
boosted Comanche on megasquirt, 8.90"s in the 1/8th. getting faster one step at a time!!
- vashxj
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Re: tach signal, speedo problem
Is there anyway to find the wires for the crank signal and trans output signal and just tap into them right at the pcm
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- Making Progress
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- Joined: October 11th, 2009, 8:04 pm
- Vehicle Year: 1989
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- Vehicle Model: comanche
- Location: dyess afb texas
Re: tach signal, speedo problem
There is no pcm anymore. Its on megasquirt now.so alk I have is the coil negative/signal from the squirt and speed sensor signal straight from the sensor
boosted Comanche on megasquirt, 8.90"s in the 1/8th. getting faster one step at a time!!
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- Making Progress
- Posts: 76
- Joined: October 11th, 2009, 8:04 pm
- Vehicle Year: 1989
- Vehicle Make: jeep
- Vehicle Model: comanche
- Location: dyess afb texas
Re: tach signal, speedo problem
Well the speedo works again. Sensor wasn't tight in the tcase and had spun away from the gear.
boosted Comanche on megasquirt, 8.90"s in the 1/8th. getting faster one step at a time!!
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