Recent content by Jim Hannon

A/C system is full, checked all pressure switches, have also ran a grounded jump wire to compressor and it works. Checked the voltage to compressor. Have 12V at both green and black wires so voltage is incorrect at the green wire. The FSM says to then check the VOLTAGE BLOWER CONTROL MODULE...

Noticed that O2 sensors are gone. After some research I found that there should be one O2 sensor on the drivers side. Is this correct? I was also wondering why Im not getting any codes since they are gone? I also heard that the prom chip can be reprogrammed to ignore them. If that has been...

I am not getting any codes. And the threaded holes for the o2 sensors are not there. Has the stock manifolds and y pipe but y pipe has been cut and new pipe welded to pipe and CAT. I dont know where o2 sensors are located on this system but was wondering if they go where the new section of pipe...

I have been trouble shooting AC problems on my 1986 L98 and noticed a diode on the compressor plug was broken in half. What is this for? Where can I get a new one? Ran all test in FSM and getting 12V to green wire and black wire located at the plug on the compressor. The system is full of freon...

New update got rid of miss and rich exhaust smell. Threw away timing light put in new injectors from injector connection timed by ear, now runs great. Noticed that the O/2 sensor are gone. How is the car running without pulling any codes?

New info on erratic spark problem. Decided to check spark with spark tester and noticed that at .035 the spark didnt seem to be very powerful. I decided to adjust the gap more on the tester to check the spark color and it made the plug wires short out all over the place. When I checked them...

Got fuel injectors on the way. Was trying the pinch test out of the FSM. I did the first step it said to: IGNITION "OFF" FOR 10 SECONDS. IGNITION "ON" BLOCK FUEL PRESSURE LINE BY PINCHING FLEX HOSE, PRESSURE SHOULD HOLD. And it did hold. It said to CHECK: • LEAKING PUMP COUPLING HOSE OR...

Had a fuel pressure guage on and when I turn key on I get an immediate 42psi and then it drops 10psi after pump goes off to 30psi in less than a second. It zeros out within 5 to 10 seconds. Have not ohm them out yet because I was thinking the injectors shouldnt be doing this. Is this correct? If...

Yes unhooked the EST wire and set the base timing a 6 Deg. BTDC. But did this with the timing light flashing erraticly. I did test the timing light on another V-8 in a chevy truck but it didnt have the HEI dist. and it worked perfectly. Will the HEI Dist. make any difference on the type of...

Now that I have been working on this car I was thinking back and it has seemed to have been running rich for a while. I dont know about the spark issue becaus this is the first time I have messed with the timing. I was setting the base timing after a head swap. Had some valve seal guides...

I have a 1986 Corvette that has a miss and runs rich. In the process of elimination I have tested the coil, pickup coil is new, Cap and rotor new, MSD spark plug wirers test with in range. I hooked it up to a timing light and the spark is very erratic on every cylinder. Timing light is working...