I have a 1998 Chevy blazer check engine light keeps coming on with codes p0171 and p0174. Have changed lower intake manifold gasket, mass air flow sensor, fuel pump and complete tune up. Longest light stayed off was 4 days. What's next?

I have a 1998 Chevy blazer check engine light keeps coming on with codes p0171 and p0174. Have changed lower intake manifold gasket, mass air flow sensor, fuel pump and complete tune up. Longest light stayed off was 4 days. What's next? 2 Answers

1996 Chevy Blazer LS 4 door 4.3L vortec engine we were driving down the road and it was working good. Then I hear something pop in the front end. Right after that it got real rough skipping till we stoped at a light and it shut off. It will turnover but will not crank. We have changed the fuel pump sensor. Also the ignition control module has been changed 2 Answers

SUV was driving it and I heard a pop sound in the front some where. it started to skip really bad and shut off and has not cranked since, We have changed the fuel pump module or whatever it is calle...

I have a 1999 Chevy Blazer, 4x4, 4.3 vortec. We have changed the coil pack, fuel filter, distributor cap and button, the crank shaft sensor, cam sensor and plug wires as well as the ignition control module. We coming to a stop sign it will stall and sometimes when just sitting still. Sometimes it will start right back up and other times it takes several tries. I also have the oxygen sensor on order and it should be here tomorrow. Fuel pressure tested perfectly. No black smoke, no smell of rotten eggs or the cat glowing red. The only code that comes up is PO420. 4 Answers

I have a 1999 Chevy Blazer, 4x4, 4.3 vortec. We have changed the coil pack, fuel filter, distributor cap and button, the crank shaft sensor, cam sensor and plug wires as well as the ignition control m...

oI have a 1990il sen fuel filter, mass air flow sensor, throttle position sensor, 1 Answer

I have a 1999 Chevy blazer 4.3 the only way it starts is by pouring gas in the carburetor. We have changed the spider assembly, fuel pump, oil sensor, fuel pressure regulator, mass air flow sensor ...

97 Chevy blazer had an complete tune up . BUT my check engine light came right back on again reading misfire what else could it be 2 Answers

I have a 97' Chevy Blazer. My check Engine light came on bout a week are so ago. But during that time, during that week I'd went to auto parts store were they said I'd a misfire. So I'd gotten a ...