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Prev Professional Automotive Repair Technical Discussions for May 19, 2013
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1997 GMC Yukon SL 5.7L Oil Pump VIN: 3GKEK18R6V
This my personal truck, with 247,000 mile on it. After installing a new GM crate motor (due to rotted out head gaskets) there is buzzing type noise from the oil pan/pump area. The noise is loudest at at the bottom of the oil pan. After initial cold start and...
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Fixes & Summaries for GM
Fix/Summary Answers
1996 Chevrolet Blazer 4.3L cy #6 P0306 VIN: 1GNCS13W0T
It was the spider under the upper plenum. I asked the customer to come back to measure fuel pressure leak down after the key is turned off. It went from 60 to 20 in less than 10 seconds. I pulled the air plenum off of the throttlebody. There was a strong o...
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2001 Chevrolet Tracker 2.0L Hesitation, Cuts out, Misfire VIN: 2CNBJ13C31
Well several good ideas too think about but this one had the issue hide on me first time I scoped the cam/crank sensors. So I finally got it to miss good and consistently and one trick for all you diag guys, if its missing and you have same oe similar model di...
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1999 GMC C3500 Sierra SL 7.4L Poor Idle Quality, Poor Fuel Economy VIN: 1GDKC34J9X
this became a two part fix but to sum it up dis cap was the skip the first cap was a gm cap that we replaced when we installed the engine. The cap i replaced it with was a duralast cap and rotor from autozone who could have guessed that. the second part was o2... Trouble codes: P0141, P1133.
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2004 GMC Envoy SLE 4.2L powertrain VIN: 1GKDT13S34
hi guys, thanks for your feedback and did cylinder leak down and #5 cylinder has 5%, and others has nearly nothing. did a compression test and #5 cylinder has 190psi and highest is 205psi. seems ok. perform a injector balance too and all injectors results equa...
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2003 Saturn Vue 2.2L Poor Idle Quality, Surge, MIL Lamp on VIN: 5GZCZ43D53
FOUND UNMETERED AIR LEAKING THROUGH BAD INTAKE MANFOLD. REPLACED MANIFOLD AND VEHICLE STARTS AND RUNS EXCELLENT, NO MORE SERVICE LIGHTS ON. Trouble codes: P1514 (Airflow to tp sensor correlation high).
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