Question about 1998 Chevrolet Blazer

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Multiple misfire code

I have the multiple misfire code on my 1998 Chevy Blazer. The code won't clear, and it runs erratic.

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I had same problem distributor gear becomes worn replace it and will most likely fix your problem they are known for distributor issues

Posted on Jun 30, 2009

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Change your spark plugs and wires, then see if that resets it... the code will only reset if you fix the problem, it will not reset if the problem has never been touched to repair it...

Posted on Jun 24, 2009

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1 Answer

ReNissan P0300


a misfire can be mechanical as well as electrical
code p 0300 is random/ multiple misfires detected
low fuel pressure is a probable cause from a problem fuel pressure regulator or problem EVAC system not venting properly causing a vacuum in the tank and starving the pump
erratic could be from valve problems on heating
loose valve seat insert/s, incorrect valve clearance from faulty hydraulic followers, cam shaft lobe failures are all part of the mechanical reason for random /multiple misfires

Oct 01, 2016 | Cars & Trucks

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Chevy Blazer Service Engine Soon light is blinking and temperature is slowly rising. There is plenty of oil in the car, water level seemed low so added water, now all of a sudden there is a loud rattling...


engine soon flashing is a urgent code (P0300) it is multiple misfire and the result is converter catalyst could be red and create exhaust leak
I am concern about misfire it is very dangerous for converter and fire in the car or melted carpet
find out the code retrieve

Oct 03, 2013 | 1997 Chevrolet Blazer

1 Answer

P0300 98 chevy blazer


po300 is the code for multiple cylinders misfiring Probably tuneup time

Feb 03, 2013 | 1998 Chevrolet Blazer

2 Answers

Hello I have a 1999 Chevy Blazer with a 4.3L I keep getting the code Multiple misfire or misfire cyl 5. I have replaced the crank sensor, cam sensor, ignition module, map sensor, injectors, fuel filter,...


Make sure plugs are gapped correctly and coil pack is good . If can't feel it missing could be a false code generated by computer . Hope this helps

Dec 19, 2017 | 1999 Chevrolet Blazer

1 Answer

I have a 1999 Chevy Blazer 4.3 . It is running bad . I used an OBD II scanner and it pulled up a PO300 code which suggests a Laundry list of things that could be wrong . ...


p0300 should be multiple missfire. check for compression these engines tend to bend valves very easily if ran on old gas or a batch of bad gas. causing it to missfire in more than one cylinder. they also crack heads between valves if overheated.

Mar 16, 2011 | 1999 Chevrolet Blazer

1 Answer

Did a complete tuneup and cleared code but i still get cylinder misfire or multiple cylinder misfire.


is the timing correct did you do a compression test on engine possible engine misfunction does it run rough and miss no power

Jan 25, 2011 | 2001 Chevrolet Blazer

2 Answers

98 camry engine light on w/misfires & system too lean


take sample of your fuel into clear plastic bottle from fuel line
is there any water present?
this can cause these codes and then not go on storing codes for other bank even though that bank will be missfiring also due to water & P0300 Random/Multiple Cylinder Misfire Detected being logged
check all connections to coils/leads & wiring connectors
due to miss fire codes for cyl 1,3,5 all on the same bank
also look and check for air leaks on that bank (hose knocked off or splithose)inlet manifold gasket,brake booster etc...
3 injectors being blocked slightly on same bank posible!!!
check wires and signal

was it running like this b4 tune up & repairs?
this is what codes are
P0170 Fuel Trim Malfunction (Bank 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0305 Cylinder 5 Misfire Detected

the last code is for trans due to misfire/running lean on bank 1 probably a torque problem code
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May 29, 2009 | 1998 Toyota Camry

1 Answer

Multiple misfire


it could be in the timing...you might have it checked

Jan 29, 2009 | 1998 Chevrolet C1500

1 Answer

Put a checker on it and got a p03000 random multiple cyl misfire


you are getting a misfire and 99% of the time you need a tune up
plugs and wires and clean your throttlebody

Oct 27, 2008 | 2001 Chevrolet Blazer

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