flowmaster
Registered
Recent repair history: My '97 Mark III with 282K needed new rear air bags & shocks and since the fuel pump was original I decided it was a good time to do that repair also. I knocked those repairs out and discovered from reading the service manuals that the doors must be closed in order for the air compressor to engage (after 30 sec.) to inflate and to seat the new rear air bags (loud normal pop occurs). Once that was taken care I then proceeded to figure why the the car was not starting. I then realized the IFS (inertia fuel switch) might be tripped since I had the rear of the car still up in the air, once the car was lowered it fired right up and I took it for a 10 minute spin with the car performing perfectly. I then decided to go all out with rear end work and change the differential oil but I forgot to kill the air suspension switch in the trunk before I raised the rear end like I normally do. Once the oil was changed and I lowered the car and tried to start it - it would not fire up.! the starter turns the engine over fine - just does not run ... really odd.
1. I then confirmed I had no spark by spraying a few shots of starting fluid direct into the throttle body with not even a misfire on any of the cylinders.
2. Confirmed the new fuel pump was still working fine even though I could hear it engage by removing the pressure from the fuel rail shredder valve and seeing it re pressured up after a start attempt.
3. Confirmed the IFS switch in the trunk, red was fully repressed - did not move down a bit, manual says it only travels 2mm in stroke - it was firmly down ready to pop up, so it must not have tripped it.
4. Removed the negative side of the battery for a few minutes thinking it would reset the PCM (Powertrain Control Module) - no change.
5. Replaced all (8) coil packs at spark plugs about 20 months ago.
Any ideas.....?? This one has got me scratching.
Thanks,
Michael
Duluth GA
1. I then confirmed I had no spark by spraying a few shots of starting fluid direct into the throttle body with not even a misfire on any of the cylinders.
2. Confirmed the new fuel pump was still working fine even though I could hear it engage by removing the pressure from the fuel rail shredder valve and seeing it re pressured up after a start attempt.
3. Confirmed the IFS switch in the trunk, red was fully repressed - did not move down a bit, manual says it only travels 2mm in stroke - it was firmly down ready to pop up, so it must not have tripped it.
4. Removed the negative side of the battery for a few minutes thinking it would reset the PCM (Powertrain Control Module) - no change.
5. Replaced all (8) coil packs at spark plugs about 20 months ago.
Any ideas.....?? This one has got me scratching.
Thanks,
Michael
Duluth GA