Question about 1999 Chevrolet Tahoe

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#6 cylinder misfire

1996 Suburban v8, changed to upgraded Delco injector spider assembly, spark plugs, cap, rotor, and still have the #6 misfire. Any ideas what is causing this.

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Could be a vacuum leak around the intake manifold. with enginerunning spray car cleaner around intake if rpm changes then there is a leak

Posted on Jul 12, 2009

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May be your spark plug wire, try swapping spark plug wire with another cyl. to see if misfire follows that #6 wire to the cyl. you switched it to. If no change you may have injector problem. Have a good one!

Posted on Jul 12, 2009

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Could be a valve seat burnt, check compression, if lower than the rest, probably that or a head gasket leak next to #6.
Borrow or buy a compression tester or get a garage to test for you.
To fix you will have to determain wether the valve can be ground back in or a new seat is required, but either way, as it's a big job, get all the valves done as if one has gone, how long before more go?

Posted on Jul 12, 2009

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1 Answer

I have a 98 honda accord 5 spd it has a 4cyl motor vtech i just need to know how to fix a miss fire in cylinder 2 and wich one is cylinder 2


Cylinder #2 is the the second spark plug counting from the right to left.
EX.Below are spark plug on engine
engine
-------------------------------
' (oil cap) '
' (4) (3) (2) (1) '
'_________________'

Your misfire can be cause by couple of things but the cheapest way that you can try to fix your car is to do a tune up by replacing:
1)all spark plugs
2)do a oil change
3)spark plug wires
3)distributor cap and rotor

note misfire can be cause by:
1.bad gas
2.spark plug and/or wire
3.distributor cap and/or rotor
4.valve adjustment
5.injector
6.off timing
7.ECM
8.bad wiring(power, ground or feed line)

Jul 08, 2011 | 1998 Honda Accord

2 Answers

I have a 2000 gmc jimmy with a service engine soon light. i received the code p0302 misfire detected cylinder 2.I replaced spark plugs and distributor cap and rotor. but still on. any other suggestion?


Well, Spark Plugs wear over time,seldom fail to fire
A worn or dirty rotor and cap will still fire, also

You never throw new wires at it,I don't,mine last 18 years,
on all vehicles

You need some OBD2 knowledge,start studying

The PO302,last # is the cylinder
Number 2 is misfiring

If you got individual coils, go there
If you got an ignition module, for all the cyl,go there
If you got plug wires,there is an extremely odd chance, one burned out inside ,on #2
& you did say your have a dist cap.

So you do have a cylinder monitor,that detected it
That may be the crank sensor,another possible

Need to know the system and how to test it.

You need to give veh specifics ,not just a year

Dec 01, 2010 | 2000 GMC Jimmy

1 Answer

Auto question,I have an 96 Dodge Ram w/ 5.2L V8 eng.the problem is dtc codes P0300 and P0301,random multible cylinder misfire detected,and cylinder #1 misfire detected.Ive replaced the spark plugs, plug...


I would check the injector. Pull the plug and check for corrosion. Use on ohm meter to check the injector. The resistance should be 11 to 15 ohms. Check it against another injector. they should be close. You can also check the injector plug. best to use is a noid light, but you can use the meter. set it to dc volts to check. the numbers should jump everytime it fires. since you got a 300 and 301 misfire it tells me that you have an intermitant misfire in cylinder 1. The other sensors are still good don't replace them. The coil is still good, because when it starts to go, it will have misfires on all cylinders or will not work at all. The crank sensor is the one that detects the misfire, again don't replace it because it's not bad, it's just doing it's job. If the injector and harness check out good then I would start check the cylinder for compression and mechanical problems

Nov 24, 2010 | 1996 Dodge Ram 1500 Club Cab

1 Answer

Engine misfiring.


most all v8's have the same firing order which is 1,8,4,3,6,5,7,2. sparkplug gap seems fine. with the engine off, bend the sparkplug wires between your fingers, if small cracks appear then replace them. number one sparkplug is located at the front driver side of the engine, front to back on this side are cylinders 2,4,6, and 8 respectively. turn the engine to the compression stroke on number one, pull the cap, the rotor points where number one will be.

May 11, 2017 | 1996 GMC Suburban

2 Answers

1996 tahoe , codes are showing random misfire


Do an injector balance test and a cylinder leakage test. Lets make sure its not fuel related. Most important lets make sure you don't have a vacuum leak.

Apr 06, 2010 | 1996 Chevrolet Tahoe

2 Answers

What do these trouble codes mean po306 cyclinder misfire detected .how do i fix the problem?


it means you have a misfire on the number 6 cylinder

this could be caused by a whole lot of reasons.

start by inspecting for a bad plug wire if it has them

check for fire on the cylinder with a spark test tool from local part store

if it is a coil-on-plug set-up, check the coil for fire

replace coil/plug wire as needed, replace boot on coil if coil needed, replace spark plugs

Oct 11, 2009 | 1998 Chevrolet Blazer

3 Answers

Engine running on 7 cyl. 1996 chevy 1500 pic-up 5.7V8


I've got the same problem - turned out to be the CSFI (a.k.a. the fuel spider assembly). GM put these piece-of-trash units in their trucks from 1996-2000 and they get coked-up with junk from the gas tank so the central electronic unit will actually shut off the cylinders one-by-one. Get it replaced - don't even bother trying to get it cleaned. It's expensive either way. But by getting it replaced you'll actually be upgrading it since the original units are no longer sold (wonder why)... You can get them cheapest from GMPartsDirect.com, or you can Google "CSFI to MPFI conversion."

Dec 07, 2008 | 1996 Chevrolet C1500

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