Question about 1987 Chevrolet Blazer

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87 K5 was running yesterday this morning went to leave and dome light, headlights, check engine light and fuel pump arent working.

I checked all the fuses they are all good. Replaced the fuel pump relay, that wasn't it. It was running a little rough and every so often engine light would come on with a code 44 I believe, changed O2 sensor as well as the TPS.

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  • 298 Answers

It has to do with the secondary air intake. first check for any cracks or leaks in the air intake system. most cars have a plastic routing tube that cracks or gets a hole in it from friction . could be even a bad clamp.check these places first. you might want to disassemble the whole air intake hose apparatus so you can really see whats going on on the bottom side.good luck ,and give me a rating if it helps,Gary

Posted on Apr 19, 2014

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Posted on Jan 02, 2017

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SOURCE: Check Engine Light - O2 Sensor - bank 1 running lean

you should have three oxygen sensors on your car, one for each bank of three cylinders; should be towards the Y pipe on each exhaust manifold. Additionally you should have one on the exhaust pipe before the cadilitic converter.

Posted on Nov 20, 2008

  • 40 Answers

SOURCE: Rough running and rough idle

Doesnt sound at all like an electrical control issue... more like a tune up...
How many miles? If its hard to start its typically due to spark plugs being worn down with age.. that engine has individual coils per cylinder so there are no "cap, rotor or wires" involved... just replace the plugs, they are platinum and they are about 8-9$$ each x8... but that is what you need

Posted on Nov 25, 2008

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SOURCE: 1987 chevy s10 2.5l tbi will not start. changed

That eliminates the crankshaft and camshaft position sensors. Have you checked the fuel injector itself for an open winding or stuck valve plunger? There should not be a steady 12 volts to the injector--if good injector, it would be spraying fuel steadily into the throttle body. But at least the engine should try to run if poorly. Take the injector out, dry it off with air, and intermittently apply 12 volts to one terminal while grounding the other. You should hear a click from inside every time you touch 12 volts. If not, replace it. If it does, it may be plugged with debris. Try blowing through it in reverse with compressed air.

Posted on Jul 17, 2009

pippall
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SOURCE: 1987 chevy S10 engine idle problem

relace the throtle air idle valve.The temp switch will allso cause this problem.

Posted on Jul 19, 2009

  • 25 Answers

SOURCE: I own a 2002 Chevy Trailblazer with 4200 vortec

Do you know if the plugs were changed, a bad or broken plug will also cause rough idle and slow acceleration?

Posted on Oct 21, 2009

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