Car is sitting in gas station parking lot, got of work today had a couple mins so went to check out.
Fuel is normal (30-35 at idle, goes up with rpm) What is spec?
Checked compression on most accessible cylinder, 120 lbs after 3 puffs.
Disconnected both oxygen sensors, did not change.
Disconnected IAC, instantly killed. (good i assume?)
Had to leave her sit for today, will try again tom.
Want to try checking timing, however i cannot find the reference bracket by the balancer- may be missing.
Could a mis-adjusted crank sensor cause this condition?
A few notes:
Check again for vacuum leaks. Don't forget to check vacum lines along the passenger side firewall and to the passenger PCV. Also remember to check the entire line from the Drivers PCV to the air inlet tube (this tends to pop out at the elbow to the tube, and also at the transition between the plastic under the snout and the rubber line to the tube right by the DIS mosule and fuel lines. Vacuum leaks are the biggest cause of lean mixtures.
Also, it could possibly be blocked up mufflers, it's rare, but I have seen mufflers get clogged up and restrict exhaust flow. I've seen one that was so bad on a mercedes, the truck carpetting actually caught fire from the heat on the muffler.
Run a scan and check for codes. Even if the CEL light isn't on, there may still be hard codes in memory that might help point you in the right direction. Take the 10 minutes and do a scan.
Check fuel pressure with a sudden throttle movement and load. See if the fuel pressure drops down when the motor gets loaded. It might be holding pressure at idle, but not flowing enough to make pressure during load. If the presure spikes down, replace the fuel filter andtry again. There could also be a problem with injectors.
There should be a timing mark on the crank pulley and degree markings on the plastic balancer/sensor splash shield. If you take off the shield, I believe there is another set of marks directly on the T.C. Disconnect the SPOUT and check base timing. I doubt it's a timing problem though, as it is unlikely you would have a lean mixture.
Another strong possibility here is a bad MAF sensor.
Somethings to think about and check.
