Bought a 95 exteded cab truck with issues - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ackattack · 07-28-2013, 10:07 PM

Quote:

Originally Posted by Warrens69GMC

Check vacuum for reliable operation (~18lbs steady)

Ign control module test.

checked the vacuum at 18-19 in Hg

After doing some research, it appeared that a malfunctioning EGR system could cause some of this. So I started to check that and got stumped with the EGR solenoid. I made a different post about what i found since it is more of a specific question.

http://67-72chevytrucks.com/vboard/s...d.php?t=590456

Also, as I was messing with the EGR stuff today, the engine seems to be starting a little easier.

Ackattack · 08-01-2013, 11:47 PM

Got it figured out!!!!

After messing with the EGR and solenoid and scratching my head and taking it for a test drive I decided to check the timing again since it was idling pretty well. Now, remember this is a '95, so there is not a connector on the passenger side firewall like the older ones. However there is a single wire connector on the drivers side firewall. So I pulled that to check the timing, and it was at 0, but the engine didn't change sounds as if the timing was retarded when I pulled this connector. Also, I realized the check engine light didn't come on. So I reconnected it, and checked the timing again.....still at 0. Hmmm.......I was thinking maybe it wasn't advancing the timing with it connected or something. So I break out my manual and read......and discover the timing wire for a 95 only is under the glove box!

I disconnect that wire, the engine lugs and almost dies. I check the timing, its way retarded to the point that I can't even see the mark. I turn off the engine, give the dizzy a spin to about where I think it should be (based on the spark plug wire position), start it back up, and I'm dead nuts on at 0. Reconnect the wire, the timing advanced (to maybe 10).

Take it for a test drive and it runs great!

So the lesson learned here is read the fine print and don't make assumptions.

All in all this little "mistake" cost me several hours of time and an EGR solenoid that I just leave installed. So pretty small cost for a reading lesson.

Anyone want to buy a pickup

08-01-2013, 11:47 PM	#27
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,525	Re: Bought a 95 exteded cab truck with issues Got it figured out!!!! After messing with the EGR and solenoid and scratching my head and taking it for a test drive I decided to check the timing again since it was idling pretty well. Now, remember this is a '95, so there is not a connector on the passenger side firewall like the older ones. However there is a single wire connector on the drivers side firewall. So I pulled that to check the timing, and it was at 0, but the engine didn't change sounds as if the timing was retarded when I pulled this connector. Also, I realized the check engine light didn't come on. So I reconnected it, and checked the timing again.....still at 0. Hmmm.......I was thinking maybe it wasn't advancing the timing with it connected or something. So I break out my manual and read......and discover the timing wire for a 95 only is under the glove box! I disconnect that wire, the engine lugs and almost dies. I check the timing, its way retarded to the point that I can't even see the mark. I turn off the engine, give the dizzy a spin to about where I think it should be (based on the spark plug wire position), start it back up, and I'm dead nuts on at 0. Reconnect the wire, the timing advanced (to maybe 10). Take it for a test drive and it runs great! So the lesson learned here is read the fine print and don't make assumptions. All in all this little "mistake" cost me several hours of time and an EGR solenoid that I just leave installed. So pretty small cost for a reading lesson. Anyone want to buy a pickup __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index



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