Question about 2000 Chevrolet Blazer

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Why would my blazer have a bad miss in it when i start it?

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4.3 liter engine with port fuel injection unit nickname(the spider) if you try to look one up will cause this problem and it hassince 1995 when it first came out.I was on the North american research team (eastern seaboard) group with AC Delco to try to solve this problem.There was 3 different things causing this #1 poppet in 1 or 2 cylinders sticking open slightly during shut down and making that cylinder load slightly with gas which has to burn off on start up.next was the pressure regulator inside plenum leaking and loading a couple of the cylinders. This is the most likly cause.

Posted on Jul 05, 2010

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Posted on Jan 02, 2017

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Our fuel pump stopped working on our 98 Chevy Blazer V6 4.3L Vortec Engine, so we bought a new one. A couple days later (before replacing the fuel pump) it started up and ran but ran crappy. So we did


what did you do (replace it) if you still have a miss you may need to tune it up / make sure the fuel pump you bought is for the right psi for your blazer

Mar 27, 2013 | 1998 Chevrolet Blazer

1 Answer

Weak spark on no. 6 cyl 2001 blazer


Something else wrong with that cylinder. Check compression and swap injectors, etc.

Jul 27, 2017 | Cars & Trucks

1 Answer

1997 chev blazer needs to be warmup to keep it from missing goin down the road.have replaced most of the electric parts,has spider injectors cleaned them what could be causing it to miss


MISSING CAN BE CAUSED BY CLOGGED FUEL FILTER,BAD SPARK PLUGS AND WIRES, WEAK OR FAULTY IGNITION COILS, YOU COULD HAVE VACUUM LEAK AT THE INTAKE MANIFOLD OR YOU HAVE LOW UNEVEN CYLINDER COMPRESSION.

Jul 07, 2011 | 1997 Chevrolet Blazer

1 Answer

96 blazer won't start in the rain.took to several professionals that cant fix it. works fine otherwise


Sounds like it could a bad coil.But if you wait until it does start take a spray bottle of water and while running spray the distributor cap and listen for it to start missing if does replace the distributor cap if it does'nt replace coil.

May 17, 2011 | 1996 Chevrolet Blazer

1 Answer

My 96 blazer was running fine then battery light came on and abs light and air bag lights came on and then engine started missing.


Blazers aren't necessarily known for bad ignition switches (which it sounds like), but I would suggest a battery problem ( known more for this). Check the battery connections, especially the positive post. Make sure the connections are tight and no corrosion. If the battery checks out good then I'd suspect the ignition switch failing. The ABS and AIR BAG lights will come on when the battery gets low.

Apr 11, 2011 | 1996 Chevrolet Blazer

1 Answer

I have a 2001 blazer that is throwing a P0306 code which to my understanding is a misfire on cylinder 6. I sprayed carburetor cleaner through a vacuum line which was suggested by a local mechanic to clean...


the only reason it stoped missfiring when idleing was cause your moter was running off the extra boost of the carb cleaner try replacing the plugs and wires before doing that again boss. and you can fid out if its a hard miss by power braking put it in drive and keep your foot on the brake then increase the gas till the car tire just starts to slip if it misses really bad u have a hard miss caused by a coil pack or really worn spark plug or bad plug wire.

Nov 29, 2010 | 2001 Chevrolet Blazer

1 Answer

Suddenly started missing badly and backfiring at


could be a mass air flow sensor, or a bad fuel pump.

Feb 09, 2010 | 2000 Chevrolet Blazer

1 Answer

Starts and runs rough with black smoke as flooded


when you replaced the plugs/wires. Did you do the cap and rotor too
Also have your timing checked

Jul 10, 2009 | 1988 Chevrolet Blazer

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