Tach Pulses Malfunction?
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Joined: Nov 2015
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From: Chicagoland IL
Tach Pulses Malfunction?
I've had on/off starting issues with my '93 LT1. Will start, die out four or five times before finally starting. Then it runs great. Service ASR light comes on. I have a code 62 in history. Code 62 in the FSM deals with Tach Pulses Malfunction. Does anyone have experience with this situation? I'm a newbie with this.
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Joined: Nov 2015
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From: Chicagoland IL
The starting problem is random. The car started like a champ this morning. I have the SES light at start up along with the red battery light (volts show 14.3 while driving). Both go away upon start-up. The ASR light is random. Not there at start-up. Comes on while driving.
Regarding the tach filter, I'm reading that a grounding issue may be involved?
Regarding the tach filter, I'm reading that a grounding issue may be involved?
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Joined: Nov 2015
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From: Chicagoland IL
Tach filter ground
I traced down the tach filter ground to the front of the engine. The bolt was somewhat snug, not tight. I removed the bolt and ground wire and cleaned it up. Two days now and no starting or dying out problems. Running great. Fingers crossed.
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Thread Starter
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Joined: Nov 2015
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From: Chicagoland IL
Part 2
So... my Code 62 showed up again yesterday.
Car had same start/die, start die. Then service ASR light came on again. The FSM says the there is likely an open between the I/P tach wiring and CKT 121 wiring at the "bulkhead connector C100 terminal "G1". I have no idea where to locate this bulkhead connector. Any ideas?
Thanks.
Car had same start/die, start die. Then service ASR light came on again. The FSM says the there is likely an open between the I/P tach wiring and CKT 121 wiring at the "bulkhead connector C100 terminal "G1". I have no idea where to locate this bulkhead connector. Any ideas?Thanks.
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So... my Code 62 showed up again yesterday. Car had same start/die, start die. Then service ASR light came on again. The FSM says the there is likely an open between the I/P tach wiring and CKT 121 wiring at the "bulkhead connector C100 terminal "G1". I have no idea where to locate this bulkhead connector. Any ideas?
Thanks.
Car had same start/die, start die. Then service ASR light came on again. The FSM says the there is likely an open between the I/P tach wiring and CKT 121 wiring at the "bulkhead connector C100 terminal "G1". I have no idea where to locate this bulkhead connector. Any ideas?Thanks.
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From: near the thumb in the mitten
The panel that is commonly called "Firewall" ;the auto makers will call "bulkhead". Bulkhead connectors can refer to any connector that where a panel separates the male and female halves of a connector. A "pass thru" would be where wiring harness is encased in sealer with a flange (no connecter) where it passes thru an panel.