engine stumble
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,987
Likes: 6
From: Arkansas
St. Jude Donor '11-'12-'13-'14-'15,'19
engine stumble
I know this sounds strange. My car has a stumble on acceleration but only when making a left turn. No answers like only make right turns please. Ran a scan tool on it and it has no codes at all.
Got it fixed
Got it fixed
Last edited by LMDNC5; May 30, 2009 at 08:34 PM. Reason: new info
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,987
Likes: 6
From: Arkansas
St. Jude Donor '11-'12-'13-'14-'15,'19
That was my first thought so I disabled the system and it still happened. I am running out of ideas. It wont do it sitting still only when driving
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,987
Likes: 6
From: Arkansas
St. Jude Donor '11-'12-'13-'14-'15,'19
It is fixed
I finnally had a friend ride with me with a tech II hooked up. We drove around in a circle till we were dizzy and when we checked oil pressure readings it would drop to a negitive 13 PSI when it started to stumble how ever the dash gauge and HUD read 50 PSI. What we found was the gray 5 volt reference wire was losing voltage intermitently. When I grabbed a bundle of wires at the rear of passenger head and moved it around the voltage would drop. when we peeled the insulation off we found that the metal bracket wore thru the insulation and the gray wire. It was a pain in the *** to solder it back together but it is fixed now.
I finnally had a friend ride with me with a tech II hooked up. We drove around in a circle till we were dizzy and when we checked oil pressure readings it would drop to a negitive 13 PSI when it started to stumble how ever the dash gauge and HUD read 50 PSI. What we found was the gray 5 volt reference wire was losing voltage intermitently. When I grabbed a bundle of wires at the rear of passenger head and moved it around the voltage would drop. when we peeled the insulation off we found that the metal bracket wore thru the insulation and the gray wire. It was a pain in the *** to solder it back together but it is fixed now.
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Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
It is fixed
I finnally had a friend ride with me with a tech II hooked up. We drove around in a circle till we were dizzy and when we checked oil pressure readings it would drop to a negitive 13 PSI when it started to stumble how ever the dash gauge and HUD read 50 PSI. What we found was the gray 5 volt reference wire was losing voltage intermitently. When I grabbed a bundle of wires at the rear of passenger head and moved it around the voltage would drop. when we peeled the insulation off we found that the metal bracket wore thru the insulation and the gray wire. It was a pain in the *** to solder it back together but it is fixed now.
I finnally had a friend ride with me with a tech II hooked up. We drove around in a circle till we were dizzy and when we checked oil pressure readings it would drop to a negitive 13 PSI when it started to stumble how ever the dash gauge and HUD read 50 PSI. What we found was the gray 5 volt reference wire was losing voltage intermitently. When I grabbed a bundle of wires at the rear of passenger head and moved it around the voltage would drop. when we peeled the insulation off we found that the metal bracket wore thru the insulation and the gray wire. It was a pain in the *** to solder it back together but it is fixed now.
That was going to be my recommendation,,, check that warness for chaffed wires. Seen that problem about 6 or 7 times. Great work! The problem wasnt loosing oil pressure but, loosing the 5 VDC ref sig that powers about 4 other things critical for engine operation.BC
