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Free fix to a mis-fire problem Posted by MI-Roger [Email] ![]() ![]() |
My Viggen started bucking on the drive home tonight as the engine was missing. I stopped for gas, popped the hood and checked all vacuum lines and charge air hoses. All were tight. I checked codes when I got home hoping to find the P1312 or P1334 code for random misfires. Instead I saw P1304 for mis-fire on cylinder 4 only.
I have a new DIC/IDM in the basement so I grabbed that, removed the four screws, went to unclip the wiring harness, and What? The locking tab had not been locked and the connector was pulling free.
Son-of-a-gun, I reseated the connector, locked the red clip, and returned the new DIC/IDM to the basement. Still don't know why I didn't spot the problem when I popped the hood at the gas station and was tugging on vacuum lines in the proximity of the connector.
->Posting last edited on Wed, 12 Aug 2015 16:58:43.
_______________________________________ Saabs owned: 2008 9-5 Aero Sedan, sold at 227K miles 2006 9-3SC 2.0T - Wife's daily driver 2000 Viggen Convertible - Sold May, 2022 1964 Quantum IV Formula Car - Retirement project 2000 9-5lpt Sedan, sold at 318K miles
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