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Help! What Have I Done :(

BIT SUS

By BIT SUS,
in Engines & Forced Induction

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BIT SUS Mentor

BIT SUS

Posted
Posted

I spent the last two nights working on the GTR:

1) Removed all the recirculation piping right back to the turbo inlet pipes, and blocked the holes in the rubber inlet hoses. It was previously blocked off before the splitter pipe in front of the rubber inlet hoses (I have an atmo BOV, so no need for the recirculation piping)

2) Moved my boost solenoid to a better location (slightly longer lines)

3) Fitted up all the factory breather hoses and PCV valve

4) Cleaned the AFMs wiht contact cleaner

Started the car up tonight, it ran fine for the first KM down the road, now it runs like poo! :blink:

stutters and barely holds revs before stalling.

What have i done?????

*worried*

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BIT SUS Mentor

BIT SUS

Posted
  • Author
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not plugged in the AFM's properly... clean the afm plugs with contact cleaner...

hmms, i did tape up the connectors a bit, and did push them in till they clicked... would that explain why it ran fine for the first 1km down the road tho?

Benzino33 Experienced

Benzino33

Posted
Posted

hmm, maybe one of the parts u blocked may hav unblocked somehow and caused an intake leak,,just check them all again,, and did u make sure ur afm was completely dry before putting it back in?

BIT SUS Mentor

BIT SUS

Posted
  • Author
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hmm, maybe one of the parts u blocked may hav unblocked somehow and caused an intake leak,,just check them all again,, and did u make sure ur afm was completely dry before putting it back in?

boost gauge is only reading -15psi instead of -20 vacuum, so there has to be a vacuum leak somewhere. will suss it out better tonight.

BIT SUS Mentor

BIT SUS

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  • Author
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well, still no luck after another 6 hours spent..

I have:

checked all intercooler hoses/clamps

checked all breather hoses/clamps

checked my HKS BOV

checked all intake hoses/clamps

re-cleaned AFM elements, connectors, and even took the covers off to look for dry solder joints

re-fitted the recirculation piping the way it was previously.

still idles rough, and hunts for revs at 1500rpm, and when i tap the accelerator, it stalls

anyone got any other ideas? its driving me nuts, and i want it running for the weekend!

ovrtym33 Proficient

ovrtym33

Posted
Posted
well, still no luck after another 6 hours spent..

I have:

checked all intercooler hoses/clamps

checked all breather hoses/clamps

checked my HKS BOV

checked all intake hoses/clamps

re-cleaned AFM elements, connectors, and even took the covers off to look for dry solder joints

re-fitted the recirculation piping the way it was previously.

still idles rough, and hunts for revs at 1500rpm, and when i tap the accelerator, it stalls

anyone got any other ideas? its driving me nuts, and i want it running for the weekend!

have taken it back to Simon at Morpowa or atleast rung him???

im sure he be able to fix it

he tunes my 33, had an idle problem ages ago n he managed to track it down

scotty nm35 Grand Master

scotty nm35

Posted
Posted

Sounds like dry solder joints in AFM, did you dab some new solder on while you had the lid off? You wont be able to see the crack in the joint, its usually where the plug comes in.

A vac leak shouldn't affect driving too much, just idle. You can sometimes find them by spraying aerostart or carb cleaner around the plenum.

Tangles Grand Master

Tangles

Posted
Posted

I can come over with consult/laptop to have a look

have you tried simply re-setting your ecu (ie disconnect battery for 10mins, pump brake a few times)

atmo bov - why? the stock gtr bov should be fine tbqh.

BIT SUS Mentor

BIT SUS

Posted
  • Author
Posted
I can come over with consult/laptop to have a look

have you tried simply re-setting your ecu (ie disconnect battery for 10mins, pump brake a few times)

atmo bov - why? the stock gtr bov should be fine tbqh.

hey mate

car is sitting at JMS for Brady to look at

haven't reset the ECU no. (its a PowerFC)

As for the BOV, I had to remove the stock ones because they were in the way of the front right wheel on full lock...

Plus, I save a heap of weight over the front wheels by removing nearly 10 kilos of cast alloy pipes, recirculation pipes, etc.

paulr33 Grand Master

paulr33

Posted
Posted

is the engine check light ON? if so, its a sensor (ie AFM dead or unplugged)

check the hand controller, ETC SENSOR SW CHECK, anything odd?

if all ok, its a cooler pipe / joiner

would explain psi then running like 8psi

BIT SUS Mentor

BIT SUS

Posted
  • Author
Posted

problem all fixed and rectified.

breather hoses were affecting AFM readings, causing an epic fuel overload, and fouling the plugs. new plugs, and i bunged up the breather hoses and it will see me till a retune!

thanks for all the ideas guys! much appreciated!

Nigel

rasonline Rookie

rasonline

Posted
Posted
problem all fixed and rectified.

breather hoses were affecting AFM readings, causing an epic fuel overload, and fouling the plugs. new plugs, and i bunged up the breather hoses and it will see me till a retune!

thanks for all the ideas guys! much appreciated!

Nigel

good to see you've got it sorted. just out of interest.

was there somethign wrong with the breather hoses themselves, or were they fitted loose or something..

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