Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
It sounds to me like it is falling to advance the ignition, that is what the technitian stated, I have not connected the timing light on it . If the cat is bad will it prevent the ignition to advance,
Also when the light goes out then all runs like new. then a couple of weeks some times month lights comes on , And all goes bad. If the cats are going bad or if bad the the engine lite would stay on all the time would not clear on its own right??
Well no misfire beatifull idle---
fuel press at 65-----
coolant will have to ck.
what if there is a coolant loss??
guess ill replace the cats and hope for the best.
OK. Catalitic repraced. Engine light went out. GOOD sign, right??
well I still have the same problem, still bogs out when gas pedal is depressed.
I believe ignition is not advancing as is needed. Is the ign control module inside the ignition assembly or is an exterior module. The ign cap is good the rotor is good. She cranks up really good and the idle is right at 500 rpm. Can't get the timing light on it the damper to see if is advancing or not. The timing chain was repleced about 8 month ago. Now whAt???
IMPORTANT: Cam Retard Offset reading will not be accurate below 1,000 RPM .
NOTE: Refer to Fastener Notice in Cautions and Notices.
Tighten Tighten the bolt to 3 N.m (25 lb ft) .
I Ok. I am using an ACTRON AUTO SCANNER. Can't find camshaft retard offset.
I did get a 0.0 degrees ign advance with engine off, and 23. degrees advance with the engine at 1000 RPM. if press accelerator quick drop to 7 to 8 degrees, however if accelerator is pressed slowlly it will go to 28 degrees advance. Still i do not get any diagnostic trouble. I have a list of reading that I got with engine off and with it running. i can fax to you or send apicture of these. Thanks Jose
OK. ongine off. Mil status off,- ABSLT TPS 0.0- eng speed 0.0- calc load 0.8- map (lb/m) 0.23-MAP (HG) 28.9-coolant 165- IAT 108- ign adv 0.0 fuel syst 1 open- o2s11 0.115- o2s12 0.80- o2s21 0.140- o2s22 0.085---
Engine running.. IAT 105- ign aDV 23-23.5- O2S11 0.22 -O2S12 0.050 -O2S21 0.265 -O2S22 0.120 (OX SENSORS FLUCTUATE A LITLE BETWEEN .050 TO 0.743== ENGINE SPEED650= CALC LOAD 3.1 = mAP (LB/m) 0.98 COOLANT 192 iat 105 VEHICLE SPEED 0.0. wHAT ELSE SHOULD I CK.
OK. I ghess I will have to go to the dealer. I was told that had to leave the car overnight and they will perform a thorough test That it would take 4 maibe 6 hr for the to determine the problem @ $98 an hr. then the parts that would be neede to repair, they would not guarantee tha this would correct the problem since is an old vehicle....... that to me is a lot OF B-- S---. Thanks for your help.. Jose
What is a V C M. can't find in the book.
Danny, Jose , went to the dealer to have them ck the VCM, well it ck OK. the mechanic stated there was a bigger problem, after 1.5 hrs of trouble checking found out that the FUEL FILTER was the problem, Correct pressure however wrong VOLUME of fuel, It maques sence now, controll module saw not enoght fuel when the fuel was demanded by the engine, it was retarding the ignition to compensate for a lean fuel mix. YOu can learn something new everyday. I never though of volume and pressure, both have to be there. They ran a complete diagnostic on the engine. the technitian admited that this was the only last thing that could came to His mind, fuel quantity.
Was charged for 1 hr labor and $18.00 for filter.
Thanks for all your help. Jose
Qh I forgot was charged $1.00 disposal and taxes $7.00 still cheap.
At least I know now I have a good vehicle for anothe 100,000 miles. I hope.