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Search: Posts Made By: Cliff Harris
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Forum: C4 Tech/Performance
07-11-2020, 12:00 AM
Replies: 61
Views: 9,019
Posted By Cliff Harris

NOT true. ALL injectors are connected in parallel...

NOT true. ALL injectors are connected in parallel and all 8 fire at the same time.
Forum: C4 Tech/Performance
12-24-2019, 01:21 AM
Replies: 8
Views: 3,638
Posted By Cliff Harris

The rubber connector needs to rotate clockwise...

The rubber connector needs to rotate clockwise about 15°. Then it will fit on that vacuum connector with the yellow circle.
Forum: C4 Tech/Performance
12-23-2019, 11:40 PM
Replies: 17
Views: 1,465
Posted By Cliff Harris

I believe that's the backlight dimmer control for...

I believe that's the backlight dimmer control for the radio.
Forum: C4 Tech/Performance
12-23-2019, 11:10 PM
Replies: 2
Views: 953
Posted By Cliff Harris

The pins on the connector between the two...

The pins on the connector between the two dashboard PC boards can overheat and break the solder connections. This is usually accompanied by a burned spot on the PC board. The main culprits are the...
Forum: C4 Tech/Performance
08-11-2019, 02:55 AM
Replies: 29
Views: 22,033
Posted By Cliff Harris

There is a similar part on L98s. It is a vacuum...

There is a similar part on L98s. It is a vacuum check valve. It's located next to the distributor on the driver's side:

http://www.misterpeachy.com/VettePics/Vacuum_Check_Valve.JPG
Forum: C4 Tech/Performance
08-11-2019, 02:48 AM
Replies: 3
Views: 571
Posted By Cliff Harris

Try a Google search on the part number. I got...

Try a Google search on the part number. I got multiple hits...
Forum: C4 Tech/Performance
08-11-2019, 02:42 AM
Replies: 3
Views: 1,160
Posted By Cliff Harris

Engine Rattle

I fixed mine by tightening the exhaust manifold bolts.
Forum: C4 Tech/Performance
08-11-2019, 02:31 AM
Replies: 5
Views: 1,726
Posted By Cliff Harris

Power Brake Vacuum Booster

In most cases it's the DIAPHRAGM that fails. What the shell is made out of doesn't matter nearly as much. That said, I did have a shell crack after an engine compartment fire.
Forum: C4 Tech/Performance
03-27-2018, 08:45 PM
Replies: 5
Views: 2,017
Posted By Cliff Harris

:iagree: Me, too.

:iagree:

Me, too.
Forum: C4 General Discussion
12-25-2017, 02:03 AM
Replies: 38
Views: 2,283
Posted By Cliff Harris

I've only seen pressure in the tank when the...

I've only seen pressure in the tank when the car/tank is hot. I always drive directly from my house to the gas station when I fill up and I have never seen pressure in the tank.

Maybe this thread...
Forum: C4 Tech/Performance
12-25-2017, 01:30 AM
Replies: 2
Views: 1,764
Posted By Cliff Harris

Code 44 is an AFR code. That's caused by O2...

Code 44 is an AFR code. That's caused by O2 sensor problems. In '86 the O2 sensor is on the driver's side, so anything that happens on the passenger side is not a factor in this situation. You would...
Forum: C4 Tech/Performance
12-25-2017, 01:20 AM
Replies: 15
Views: 5,568
Posted By Cliff Harris

Check out these threads: ...

Check out these threads:

https://www.corvetteforum.com/forums/c4-general-discussion/3569629-led-headlights.html...
Forum: C4 Tech/Performance
12-25-2017, 01:12 AM
Replies: 9
Views: 1,028
Posted By Cliff Harris

The original brake system is made by PBR, which...

The original brake system is made by PBR, which is an Australian company. The exception to that is that the ABS system is made by Bosch.
Forum: C4 Tech/Performance
12-25-2017, 12:57 AM
Replies: 6
Views: 1,823
Posted By Cliff Harris

Check out this link: ...

Check out this link:

https://www.corvetteforum.com/forums/c4-general-discussion/2647036-the-ultimate-c4-diy-thread-write-ups-w-pics-2.html#post1576116036
Forum: C4 Tech/Performance
12-06-2017, 04:33 AM
Replies: 3
Views: 1,850
Posted By Cliff Harris

Does the fuel pump run for 2 seconds when the...

Does the fuel pump run for 2 seconds when the ignition is first turned on? That is controlled by the ECM through the fuel pump relay. The ECM turns on the fuel pump when it sees DRPs (Distributor...
Forum: C4 Tech/Performance
12-06-2017, 04:17 AM
Replies: 37
Views: 16,925
Posted By Cliff Harris

Try unplugging the oil pressure switch and...

Try unplugging the oil pressure switch and bridging across the two contacts on the connector. That should connect 12 volts to the fuel pump (comes directly from the battery, so the ignition does not...
Forum: C4 Tech/Performance
12-06-2017, 03:31 AM
Replies: 3
Views: 1,423
Posted By Cliff Harris

Assuming it's not a mechanical problem with the...

Assuming it's not a mechanical problem with the blend door/motor, look at the HVAC programmer. It's mounted on the firewall above the gas pedal. It is common for the resistors associated with the...
Forum: C4 Tech/Performance
12-06-2017, 03:23 AM
Replies: 16
Views: 1,010
Posted By Cliff Harris

Sounds like a short in the injector wiring....

Sounds like a short in the injector wiring. Unplug ALL the injectors (all 8 are in parallel, so if one is plugged in it will look like a very low resistance). Measure from the light green wires to...
Forum: C4 Tech/Performance
11-14-2017, 03:07 AM
Replies: 7
Views: 5,496
Posted By Cliff Harris

I found this is Google Images: ...

I found this is Google Images:

http://i.fixya.net/uploads/images/netvan_10.png
Forum: C4 Tech/Performance
11-14-2017, 03:02 AM
Replies: 6
Views: 2,421
Posted By Cliff Harris

You should have two spanner nuts that look more...

You should have two spanner nuts that look more or less like this that connect the window glass to the window regulator mechanism:
...
Forum: C4 Tech/Performance
11-14-2017, 02:51 AM
Replies: 24
Views: 988
Posted By Cliff Harris

If you think the O2 sensors are unbalanced, you...

If you think the O2 sensors are unbalanced, you can swap them side to side and see how that affects things.
Forum: C4 Tech/Performance
11-14-2017, 02:43 AM
Replies: 27
Views: 2,643
Posted By Cliff Harris

Corvettes have a recirculating fuel system. It...

Corvettes have a recirculating fuel system. It flushes itself while you drive...
Forum: C4 Tech/Performance
11-14-2017, 02:26 AM
Replies: 5
Views: 978
Posted By Cliff Harris

Sounds like a bad U-joint. The needle bearings...

Sounds like a bad U-joint. The needle bearings tend to rust in the caps and then the caps move inside the clamps when the shaft turns, thus causing a squeak.
Forum: C4 Tech/Performance
11-14-2017, 02:23 AM
Replies: 3
Views: 611
Posted By Cliff Harris

I've done several transmission cable...

I've done several transmission cable replacements. The main thing to be careful about is don't tighten the 15mm nut on the gear lever with the shifter in Park. If the trans moves into another gear it...
Forum: C4 Tech/Performance
11-14-2017, 02:13 AM
Replies: 3
Views: 656
Posted By Cliff Harris

The wires from the VSS go to the dash.

The wires from the VSS go to the dash.
Showing results 1 to 25 of 487
 
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