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rb27tt

By rb27tt,
in Engines & Forced Induction

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rb27tt Contributor

rb27tt

Posted
Posted (edited)

i hav a '93 rb26tt thats being a pig!!!!! it stalld on me a week ago then started to

over fuel heaps.... had a mate look at in on monday night and it didnt play up when

he was there (as usual) then yesterday it started to over fuel and run like a pig again.

today it wouldnt hold idle and now it wont crank!!!!!!!!! ive recently changed from a

standard computer thats been chiped by mines to an apexi power fc.... tha power fc

already had a map for this motor (its not a standard rb26) and it seemed to hold idle

a bit more solid than the mines but as i said it wont start now unless its clutched....

any help would be great :)

Edited by rb27tt
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217/r33 Community Regular

217/r33

Posted
Posted (edited)
i hav a '93 rb26tt thats being a pig!!!!! it stalld on me a week ago then started to

over fuel heaps.... had a mate look at in on monday night and it didnt play up when

he was there (as usual) then yesterday it started to over fuel and run like a pig again.

today it wouldnt hold idle and now it wont crank!!!!!!!!! ive recently changed from a

standard computer thats been chiped by mines to an apexi power fc.... tha power fc

already had a map for this motor (its not a standard rb26) and it seemed to hold idle

a bit more solid than the mines but as i said it wont start now unless its clutched....

any help would be great :)

Are you sure its poring in fuel? Have you checked plugs & coils? Injectors can be stuck open from dirty fuel and it has clogged up the injectors. Not cranking? Once again injectors stuck open so there are flooding a few cylinders, this also can be caused by bad plugs (flooded), bad coils or even ignition module. Maybe try a stock ECU? Might be the wrong tune...

Checking them one by one will take you closer to you problem...

Cheers,

Alex.

Edited by 217/r33
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rb27tt Contributor

rb27tt

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Posted (edited)

im sure it fueling up... you can see it spitting on the exhaust tip then it evaporates. and when it finally starts

it blows alot of black smoke. the mines computer ran it fine untill last sat when it stalld.

how do i go about checking coils injectors etc? could it be a prob with o2 sensors or the fuel reg?

ive gon efrom owning a datto with carbies to a rb27tt (tomei stroker) im in over my head i think :)

Edited by rb27tt
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217/r33 Community Regular

217/r33

Posted
Posted
im sure it fueling up... you can see it spitting on the exhaust tip then it evaporates. and when it finally starts

it blows alot of black smoke. the mines computer ran it fine untill last sat when it stalld.

how do i go about checking coils injectors etc? could it be a prob with o2 sensors or the fuel reg?

ive gon efrom owning a datto with carbies to a rb27tt (tomei stroker) im in over my head i think >_<

Try putting the old stock mines ECU back in. Defiantly sounds like a fuel/ignition problem. Take the plugs out and have a look at the condition. Faulty coil packs usually come from having cracks in them.

TRY:

*Taping the wire loom that connects all the coils

*Replacing new plugs to NGK iridium gapped to 0.8mm

*Checking coil packs for cracks (If so try to using silicon to fill them in)

*Maybe a new Fuel Filter

A few questions:

*Is it running a fuel regulator?

*Bigger injectors ECT..

*Any other modification you know about?

If your running bigger injectors, bigger AFM's, cams ect you most defiantly need a tune. a full list of mods will help.

It’s hard to explaining everything set by step. Try getting it to a specialist or a tuner to source out the problem.

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FATGTS-R Experienced

FATGTS-R

Posted
Posted
TRY:

*Replacing new plugs to NGK iridium gapped to 0.8mm

The last thing you want to do is throw $100 worth of plugs at it when your chasing a gremlin. A $20 set of coppers will be fine.

A simple fouled plug or split/popped off cooler hose can give the problems you describe.

Have you tried a new set of plugs?

But as you mentioned the problem has come and gone I would say its likely to be ignition related.

And as alluded to by Paul, if the power fc wasnt tuned when connected up to your engine, which is modified, then that wont help much either.

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BezerkR32 Veteran

BezerkR32

Posted
Posted

check air flow meters as well.

dude the pfc was tuned for this motor as is, i havnt changed a thing

on the motor so it should still run... i will get a set of plugs and c if that works.

how would u go about checking the intercooler pipes for leaks?

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rb27tt Contributor

rb27tt

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ok............ i took off the breather hoses on the rocker covers and blanked them off.

i re checked tha gaps in the new spark plugs (oops forgot to gap them), put the mines comp back in after changing it for the pfc again and the car runs!!!!!!!!!! lacking power and still running heaps rich but atleast

now the motor behaves under load....... going to take the pfc and car to a tuner and c whats wrong.

according to the last owner of the car that pfc spent 14hrs getting tuned for this motor set up...

buggerd if i know y it isnt working rite.... :whistling: tha mines computer f**ked out on me originaly

so im afraid to put it down to being the comp

Edited by rb27tt
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  • 2 weeks later...
rb27tt Contributor

rb27tt

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just thought id update everyone with my gremlin hunting..........

turns out it was the coils!!!!! they where rat sh*t so i got some

splitfires into her and according to the mechanic its all good.

yipeeeeeeee wonder if i will get a power increase from this????? :whistling:

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