I just did a H/C swap on my car. Now I'm having all kinds of problems.

I've searched the forums, but couldn't find what I was looking for.

The car has been running for about 3 days, but won't hold an idle & when accelerating at all it starts breaking up. I ran the codes & the only thing besides an PO300, was I think a PO171, Bank 1 lean, I thought that may be due to messing up an 02 wire or something. But this morning I started the car & all hell broke loose.

Now I've got an

Airbag light that won't go out.
ABS Inop Light
Service Vehicle light
Gas Gauge isn't working
Tach Isn't working
Temp Gauge isn't working
Check Gauges Light

My HP tuners scanner can't connect to the ECM.

I'm not going to work on the car today, I'm going to wait until tomorrow, getting kind of fed up. Can anyone lead me in any direction??

Tomorrow, I'm going to pull everything from the coil packs to the intake & double check everything, but I was wondering if anyone else has had this same issue?

 

How are you tuning? Bad EPROM write is possible considering the amount of issues you're having. If possible, write the program to the chip again before you start tearing down again.

 

Double check the ecm connection, may have come lose? Then check all the electrical lines from the ecm to the motor and interior, seems strange that it would shut down the dash readings

 

It didn't shut down all the dash readings. The Oil pressure gauge & speedo still works.

I never up loaded a tune to it. I have one built & might try that. But I'm thinking that it might be wiring problem.

 

ANy shot it's a ground problem? Are you sure you reconnected all the engine grounds? Just a guess..


--Bill

 

Yep, I bet it's a loose or missing ground. I can't believe you beat me to that one, Bill.