Rb20 Wont Start

[esky_mad]

so the story goes.... i fitted my new cefiro shell with the old RB20 from my old cefiro.

all went smoothly engine fired up almost instantly. had a few teething issues as you would expect, started and stopped it numerous times without trouble. whilst i had the engine running it just died. the fuel light was on so i assumed it was out of gas.

had a few other things to do so hasnt been started for approx 6 weeks..... fueled it up.... now it wont start just gives massive bangs through the exhaust.

*put brand new plugs in

*fitted different pump

*fuel is running the correct way

*battery is good to go

how can i tell if the CAS or ignitor is stuffed without a multimeter??

when i plug in the CAS you can hear the fuel pump prime, if that helps at all

any help is appreciated.

cheers.

[bbe]

borrow sum ones ignitor and afm mate its the easiest way.

[daisu]

Remove the CAS and spin the shaft by hand while it it plugged into the loom and the ignition key is on, check that the injectors and coils are firing. It should start with the AFM disconnected (will run in limp mode), then turn it off and reconnect the AFM, if it doesn't start then possibly the AFM is rooted.

Have you tried checking ECU error codes?

[esky_mad]

error codes came back as 55 so no answers there. i tryed to check for spark.. pulled no 1 plug out left it on the coilpack and let it rest on the cam cover, cranked it and got nothing, wasnt sure about the surface so tryed fuel rail feed also got no spark... possibly a ignitior issue or could the CAS cause no spark ??

[esky_mad]

luke it would seem you were bang on...

put another ignitor in this morning, still no change. messed around with a few other things incuding leaving the AFM unplugged. motor tentatively started. was then i realised AFM wasnt plugged in. plugged it in and motor was a little smother but would still cutout a little when revving. motor then dyed after about 5mins of running. messed around with CAS not really thinking about the AFM but couldnt get it started again... then unplugged the AFM and it once again tentatively started... plugged in the AFM and the motor instantly died. therefore im guessing once the AFM warms up it dies.... plus the fact the motor wont even start with it plugged in.

[daisu]

If it starts without the AFM and not with it then I would say the AFM is stuffed. The engine should run perfectly normal (maybe a high idle) with the AFM unplugged it will just be limited to 2500rpm.

Try pulling the CAS out and turning it by hand. If your CAS is stuffed you won't get any spark or fuel. If it's good you should hear the injectors clicking and see the spark from the coils (just pull the coils and rest them in the valley between the cam covers, they should have enough power to arc out to the cam covers).

Also inspect the half moon shaped key on the shaft of the CAS and on the end of the exhaust cam. If either of them are flogged out then the CAS will be sloppy on the shaft and your timing will be all over the place.

Also, have you tried adjusting the CAS while it is running?

[esky_mad]

injectors are ticking fine but cant see any spark... motor is a lil on the rough side with the AFM unplugged. havent been able to get any spark from no1 coil but am yet to try any of the others. but it was on all 6 cylinders when it was running with everything plugged in.

hole moon looks to be in good condition.

havent really had it running well enough to play around with the CAS.

bear in mind the AFM has been sitting around with no protection for the past 6 months.

EDIT: ok can finally confirm spark, but CAS seems to have alot of play/or just very sloopy.

Edited October 2, 2009 by esky_mad

[esky_mad]

ok i cant seem to edit my post previous posts... anyway it seems im back at square one.

can confirm im defnitely getting spark from all coilpacks, all injectors are ticking, tryed another CAS (from a CA but coils and injectors still tick and fire) Error code 12 flashes when the AFM is plugged in, but even without it pluuged in it wont fire. havent made any wholesale changes since it came out of the old car which is why i find it strange its being so difficult to start.

whilst trying to start it it turns over fine but then slows right down as if the battery is dying but then picks up again then slows down.. will crank fine for ages then slow down again etc etc... dodgy battery ?? shouldnt it still fire whilst its cranking over ok ? i would assume it shouldnt have any affect anyway for it to die everytime it does(did) start, unless the alternator is coincidently dead aswell.

ive tryed the CAS is different positions but with no luck.......... serioulsy sick of this car!!

[esky_mad]

ok im one of those people that cant let something go until its fixed or i at least no whats wrong with it...

did some more poking around and when the fuel line from the engine side of the filter is off this is what happens...

turn on the igniton.. fuel pump primes.. fuel pours out of the filter..wait.. crank the engine.. no fuel from the filter..

crank the engine all in one turn(no waiting for the pump to prime).. no fuel comes out.. i dont no much about fuel pumps, or fuel systems but surely it needs constant fuel to start, is it a result of poor voltage to the pump when cranking ??

obviously being an RB20 nowhere cares to much about my issues but some advice would be nice.

[esky_mad]

anyone ?? just want to know if when cranking the engine over fuel should contantly flow to the engine ??