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98 chevy blazer probs ?
v6 vortech 4.3 slugish idle and slight cut out when running i have replaced the plugs wires dist dist cap rotor and still getting cylinder 4 misfrire any ideas just did scan tool check again map sensor read 0 egr bad and o2 sensor bad these things make it run rough?
3 Answers
- 1 decade agoFavorite Answer
It sounds like a vacuum leak to me . The EGR valve is a vacuum operated item and the map sensor as well.They will cause your Blazer to dump to much fuel and make the 02 sensor act up. Check for a vacuum leak. It wont take to long just to see before you dump more money in a shop or parts.
Source(s): mechanic - NapLv 51 decade ago
I know that some people like to Kid around. They must be. Try using your scan tools diagnosis. It probably gave you the right codes and you looked up what they mean? Right? Always change or fix the higher of the numbers1st. Then re scan. The Next code may disappear. try It.Which ever Is 1st. Is it the o2 sensor? Or the Map sensor? Good luck
Source(s): 30 Years Auto Tech at a New Car Dealership and Repair shop owner - Anonymous1 decade ago
all these will definitely make vehicle run ruff. Check for vac leak on Map sensor and check for port clogged on EGR valve. Remeber though EGR valve has a gasket try not to tear it.
