C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1995 lt1, Error codes, 4.H22, 9.H64, 9.H72

 
Old 04-15-2019, 06:21 PM
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Droldaerd
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Default 1995 lt1, Error codes, 4.H22, 9.H64, 9.H72

Car:
-Bbk 52mm TB
-JBA Headers
-Flowmaster true dual exhayst, small hole near end before muffler, mount broke, need to get fixed
Smog says delete
-k&n air filter
-aeromotive fuel pump and preasure gauge
-msd opti spark
-accel 48kV coil
-taylor 10.4 spark plug wires

Few things I noticed on the car, so took pictures.


Wierd wiring. Looks like 2 ground wires wired into two.

Does this extra white wire from the coil need to be plugged in somewhere?

This tube from the tb to valve cover is loose on both sides.

Loose connector on the intake.

Frayed wiring on this device.

This sesnor isnt connected to anything. Passenger side of the engine.

Where to go from here?
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Old 04-16-2019, 10:40 AM
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Kevova
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Factory Service Manuals since there is some "cobbling" you would need electrical section to figure out what has been done. H codes are history and not present.

https://tech.corvettecentral.com/201...trouble-codes/
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Old 04-16-2019, 01:43 PM
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Droldaerd
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Originally Posted by Kevova View Post
Factory Service Manuals since there is some "cobbling" you would need electrical section to figure out what has been done. H codes are history and not present.

https://tech.corvettecentral.com/201...trouble-codes/
How would I figure out what's causing my check engine light then?
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Old 04-16-2019, 04:48 PM
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Kevova
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H22 it a TPS low history code. Poor connection, bad sensor, creative wiring. You could Google codes and see what comes up.

The 64 and 72 are ABS/ASR
64 relates to TPS
72 serial data between PCM and EBTCM modules aren't communicating.

Manuals, trouble trees, or Google codes and hope.
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Old 04-16-2019, 05:05 PM
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Droldaerd
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Originally Posted by Kevova View Post
H22 it a TPS low history code. Poor connection, bad sensor, creative wiring. You could Google codes and see what comes up.

The 64 and 72 are ABS/ASR
64 relates to TPS
72 serial data between PCM and EBTCM modules aren't communicating.

Manuals, trouble trees, or Google codes and hope.
Awesome thanks. ASR unit seems shot, so that makes sense. I'll check out the tps next! Wiring defintely looks "creative."
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Old 04-16-2019, 10:22 PM
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@Kevova
Thanks for the insight. I decided to replace the tps sensor as a start. The ASR is definitely dead. Previous owner mentioned it to me. I purchased a cheap used unit to see where that gets me. I noticed on the harness where it plugs into the asr, there is a second two prong, single wired connector off the same harness. Its not plugged into anything. Would you happen to know what it plugs into?
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Old 04-17-2019, 05:48 PM
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What in the name of bubba happened here?
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