Question about 1988 Chevrolet K1500

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Engine miss firing

It appears the the left bank of spark plugs are not firing all the time. Was thinking fuel injector problems just looking for some more insight.

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  • Chevrolet Master
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Change plugs and wires distributor cap and rotor.+coil.if all is good .do a compression test.

Posted on Apr 09, 2009

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2000 Nissan mis firing,, code reader shows codes: 0430; 0305; and 1320. Assuming its bank 2 cat convertor. Is this where i should start???


Your going to be spending plenty

You have to diagnose & correct your cylinder misfires
& make sure you have proper fuel control -- BEFORE--
you replace the Exhaust Converters & Oxygen Sensors,
ruined from the misfires

Properly diagnosed & everything done correctly,your looking
at about $1,000 & that is normal & those thing happen, on ALL
vehicle,even if you do all your own work

I would suggest you have a pro work on it,the best you can find
ASE Master Mechanic with L1 Certification

Oct 02, 2014 | 2000 Nissan Maxima

1 Answer

Engine only firing on left bank rtf. Side no. Fire will start and idle


Check for spark on the side not firing. If there is spark, the injectors on the right side may have a problem in the wiring to them. Older multi port injection systems used a "bank fired" approach: all the injector grounds on one bank splice together before they go into the computer to be pulsed.
All of the injectors have a steady voltage applied to them when the key is on. The same color wire to all injectors is the power wire, it is a fused circuit, the fuse is in the power distribution box, and is hot in run or start. When the computer internally grounds the injectors, pulse occurs and fuel is sprayed out. Check if the right side has power to the injectors with key on, use a voltmeter or test light. To test an injector circuit, purchase a cheap "noid light" from a parts store. You plug it into an injector connector, then crank the engine over. If the noid light is blinking, the power and ground circuit is good for that injector.

Jun 28, 2014 | Cars & Trucks

1 Answer

At idle miss firing on cyl 1 3 5


Check connectors for injectors and plug coils. The read out would have told you what injector or plug was faulty. Come back with the code numbers.

May 04, 2013 | Ford Cars & Trucks

2 Answers

97 grand marquis code P0171 bank left code with check engine light, what does that mean? also, went to start car today, turns over but no fire on the plugs at all. could this result from MAF sensor?


The MAF Sensor measures air flow into the engine
& is common to both banks or sides of the engine,so
when looking at fuel trim data you look at both banks
& remember that the maf is common to both

Your 171 is lean oxygen sensor code for bank #1,so either
a failed sensor,a slow sensor because you failed to change at
100,000 miles or a vacuum leak

A leaking injector will cause a rich condition & that report from the
O2 Sensor will cause the computer to drive fuel trim or pulse lean
as you have. So you need to do some testing & keep your thinking
cap on

Fuses never cause or fix any problems
They only open a circuit if it has too much current
flow & you don't replace a fuse, you go to wiring diagrams
to see what is on that circuit that would cause a fuse to fail
& resolve that issue

If you have no spark & no fuel injector pulse, then possibly a
crank sensor

I suggest you leave all the troubleshooting to a repair shop

Jan 30, 2013 | Mercury Grand Marquis Cars & Trucks

1 Answer

2002 Mazda MPV P0172 and P0300


-25 LFT? your dealing with a fuel injector that is leaking or not atomnizing, Inspect the fuel pressure vacuum line is fuel coming out of the pressure regulator?

Apr 28, 2012 | Lexus Cars & Trucks

2 Answers

Has gas to fuel rail,fire to spark plugs.Will not start...timing belt not broken. code reader showing an P 1131 code.


P1131 -1. Misfire on bank 1
2. Vacuum leak affecting bank 1
3. Fuel injector problem bank 1

P1130 - 1. Fuel pressure high or low
2. MAP sensor dirty/defective
3. Vacuum leak on engine
4. Leaking fuel injector or fuel pressure regulator

Dec 16, 2010 | 1998 Ford Escort

1 Answer

2003 mercedes Benz C240 codes P0300, P0301, P0302 and P0303. Please, help me how to fix?.


P0300 Random Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
according to this fault codes first mark ignition coils
3 ---------------- 6
2 ---------------- 5
1 ---------------- 4
RB-------------LB
this right banks and left bank, please remove Ignition coils with lids and spark plugs from right bank and swap with left bank, if fault code change as
P 0304 Cylinder 4 Misfire Detected
P 0305 Cylinder 5 Misfire Detected
P 0306 Cylinder 6 Misfire Detected
You can Identify it's a faulty ignition system then next swap ignition lids from ignition coils be careful each coils have two lids one short and other long bit deference and when you remove and fix it to the car keep in mind correct order because each coil two different fire for two spark plugs don't mix up, if you mix it can create the fault code.if you detect any fault ignition coils or spark plugs or lids replace that and also whether god or bad recommend to replace spark plugs, find the right that's most important thing, if this way couldn't found the any ignition fault next step is check fuel presser, when the engine running fuel presser must be around 4.5 bar without engine running must be 4 to 6 bar if the fuel presser too low need to check two different things one is fuel pump other is fuel injectors, in this case you can swap injectors from right bank to left bank and find is the injectors leaking, if not leaking faulty fuel pump.is this information helped you? if yes please leave a comment,

Oct 15, 2010 | 2007 Mercedes-Benz C230 Sedan

1 Answer

420 code catalyst system efficiency below threshold (bank 1). EGR replaced along with both upstream and downstream 02 sensors on bank 1. Check engine light keeps coming on.


You could have an enefficient converter. Question is what caused it to go bad? I have attended seminars on code 420, Possible causes are lack of spark or clogged fuel injectors. there have been times where the spark plug wire lays on the engine and over time it wears a weak spot in the side of the wire, its not enough to throw a miss fire code but it keeps the full amount of spark from getting to the plug and not burning the all the fuel in the cyl. A leaky injector would also cause to much fuel to be deliverd into the cyl and not get burned.

Hope this helps.

Jan 20, 2010 | Chrysler 300C Cars & Trucks

2 Answers

Cylinder not firing


Next step would be to check the compression in that cylinder and compare it to the others.

Oct 04, 2009 | 1997 Mazda 626

1 Answer

2001 jeep Grand Cherokee fuel injectors


check the injectors on that bank for pulses.. a regular 12v text light will do it should flash when cranking... its very possible that the crank sensor or camshaft sensor on the replacement engine is bad and giving you all the problems you have now.. are you using the original injectors? if you have injector pulses then check the coil for pulses the same way.. btw make sure you have 12v to them even before cranking engine could be a bad asd relay..wet plugs on one bank would also indicate a possible leaking injector and basicly draing the fuel starving the oposite bank for fuel.. to verify that the rail must be lifted by removing all 4 bolts make sure the clips hold the injectors firmly and turn the key to run but dont crank it then look for fuel leakin from bottom of injector(s) any drips is a bad injector..

Jan 28, 2009 | 2001 Jeep Grand Cherokee

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