No Spark

[huddy]

hi there

i've had an issue recently with misfiring.

seems that once the car gets some heat in #2 doesnt want to spark.

Its a RB24 / hks 2530 / pfc / gtr inj etc...

I just tried replacing that one coilpack with about 4 others i had laying around, but no luck. I taped around the bottom of the original one incase there was a hairline crack or something and spark was getting out.

still nothing.

I then took the coilpack out and checked for spark with the base near my intercooler piping. And nothing again...

does this mean that:

- the coilpack is dead

- or possibly that i have an electrical problem and the coilpack isnt getting, power or earth (how would i go about checking this)

Big thanks, need to sort this out asap all help is appreciated

BTW - i have checked the gaps on the plugs all 0.7 and plugs seem to be in good condition

thanks

-Matt

[blind_elk]

It's more likely the ignitor module. They are prone to breaking down with heat. You will usually find that they work fine after a cool-down period.

[J_Red33]

Series 1 or 2? Series 1 has the ignitor module mounted on top of the coil cover series 2 has ignitor built into the plug. Try putting the other coil packs on #2 cylinder output. If they then work it's not your coils.

Pretty unusual to have 5 coils fail.

[MR331307]

Series 1 or 2? Series 1 has the ignitor module mounted on top of the coil cover series 2 has ignitor built into the plug. Try putting the other coil packs on #2 cylinder output. If they then work it's not your coils.

Pretty unusual to have 5 coils fail.

Best way to check this is Get a timing light and get a Nissan Electrical Manual.Find which wire is which before and after the Ignitor. and check from there,You find that if its not firing on the light before the ignitor you have a problem from the ecu to there.If it firing before the ignitor and not after its the problem.

if its got no Ignitor,You might find a wire is cut or broken and test the same way.If you cannot get a spark still,its the ECU

[dead32]

you culd switch the coil pack over with another cylinder, see if the problem transfers, or remains on the same cylinder, culd help to isolate the issue

[huddy]

i will try isolate the issue some more and then i will try to see if the coilpack which is not working - works on another cylinder. I will also try the igniter pack

this is all on a Cefiro RB24 with power FC

thanks for the help - keep the info coming the more i can test the better!

thanks again

-Matt

[CEF11E]

my money is on the ignitor. I had the exact same problem a couple of years ago. ingitor cost me $100 and it was solved!!!

[huddy]

fingers crossed it is, i just need to find one to test it ! preferrably this weekend as i have track time next sat!

[andylaurel]

vote for ignitor

[Cubes]

I tend to think its the ignitor also.

Before forking out do check the wiring back to the ignitor, throw a multimeter on to it.

I recently snapped up an ignitor for $30.

[Guest 40th-edition]

good way to test is with that coolspray... you know the can of cold shit.

when it strats to stuff up then spray the problem ignighter/coil with that if it returns to function then problem there.

and swapping coils is a good idea to see if it is that coil

[mad082]

could be the wiring harness also.

and a very very slim possibility is that the ecu is dead. my mate had a problem where he could not get number 6 to spark. tried new coils, wiring harness, plugs, everything. it turned out his ecu had melted a hole in the chip when he'd tried wiring up some msd coils.

[huddy]

it better not be ecu - just got that brand new ap power fc :S

i'll test coilpack i know was working from another cylinder

and igniter pack

also got some new plugs just to be safe - BCPR6ES, but might have to regap them a little...

[huddy]

well igniter pack made no difference, still the same

swapped plugs around, still the same

swapped coilpacks from 1-2 and 2-1, still the same (#2 being the problem)

earth is good (unless at the back of the plug for coilpack) the middle wire had power (tested with test light). And i wasnt sure what the other wire was for (power / earth etc). this was while the car was running.

pulled the loom for coilpacks out and stripped wiring to check for broken wires. couldnt see any so i just sanded the earth and re-fitted - started perfect and ran smooth.

.... few days later - took to the dyno today... and off the dyno and misfire again :S

any more ideas?

thanks

-Matt

[CEF11E]

you don't have any of thet "special" green goo that seems to form in all the nissan connectors do you? Take off the ignighter plug and have a good look inside theplug. is the copper all green? If it is you can clean it with CRC and a toothbrush.

This goo is an excellent insulator and has given me greif on my AFM plug before took me about 2 hours to find why the car would randomly stall for no reason.

[huddy]

ok CRC being?

it was also brought to my attention that it may have something to do with injector plug connections? and they suggested green shit on plugs... but then all i would think it is not pumping fuel in, but should still be sparking?

looks like loom out again completely - re-solder resistor pack to new location, clean all terminals as best possible and re-try...

ahhhhhh :S

oh and once fitted gizzmo ibc - car now runs way too lean so need re-tune again :S fun day for me!

[C_DawG]

I tend to think its the ignitor also.

Before forking out do check the wiring back to the ignitor, throw a multimeter on to it.

You need to use a CRO to test the output of the ignitor.

[CEF11E]

he said he has already tried another ignitor.

CRC is a lubricant/dispursant like wd40 but it tends to eat the green stuff really well.

[Cubes]

I tend to think its the ignitor also.

Before forking out do check the wiring back to the ignitor, throw a multimeter on to it.

You need to use a CRO to test the output of the ignitor.

Not the wiring you dont.

[huddy]

ahhhh

yep thats what i thought the crc was...

so loom out again completely - re-solder resistor pack to new location, clean all terminals as best possible and re-try...