2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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Old 09-11-08, 12:10 PM
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help please

i just turboed my na motor and got it started and idling but when i give it gas it only revs to 2k and then falls flat on it face
Old 09-11-08, 12:16 PM
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vacuum leak.
Old 09-11-08, 12:21 PM
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can you send me pics on how you turbo'ed your na.
Old 09-11-08, 12:25 PM
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i found a small vacuum leak and fixed it on one of the block of plates by spraying carb cleaner were i thought it was leaking but then but have found any other ones
Old 09-11-08, 12:27 PM
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yeah i can send you pic when i get off work
Old 09-11-08, 12:50 PM
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good diagnosis
Old 09-11-08, 01:24 PM
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so it is working now?

And yes, PICS!

The more the better!
Old 09-11-08, 02:33 PM
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i fixed the one vacuum leak and havent found any other one and it still doing the same thing
Old 09-12-08, 01:39 PM
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here are the pics of the turbo set up


the black flexible pipe on the intake side is just so i can get the car running the guy welding the piping went on vacation for 2 week and didnt finish it so it the only thing i could think of for the time being







my buddy welding the piping removed the air intake temp senser would that do that

no vacuum leaks now just wasted ahole can of carb cleaner trying to find the smallest leak
Old 09-12-08, 01:50 PM
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your map sensor, air flow meter, injectors (unless you upgraded) and ECU is for a TII....correct?
Old 09-12-08, 01:52 PM
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no it is stock na injectors for the primary and T2 for secondary and na maf and na ecu
Old 09-12-08, 01:54 PM
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Well the NA ECU could be part/all of your problem. it doesn't know what to do with boost and seeing as it falls flat right about the itme the turbo starts to spool it makes me think that might be it.
Old 09-12-08, 01:58 PM
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Yea don't see how its going to work with the n/a electronics.
Old 09-12-08, 02:00 PM
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i have a T2 ecu for a S5 and my car is S4 so that is why the na ecu is in

i didnt know that ecu was for a S5 and the guy i bought it from didnt tell me
Old 09-12-08, 02:01 PM
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You got the harness also? Going to have to rewire some stuff.
Old 09-12-08, 02:03 PM
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no i dont have the wiring harness

if i find a S4 t2 ecu would that work
Old 09-12-08, 02:11 PM
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Part of the problem. THere is a writeup somewhere about all to change. afm, pressure sensor, etc.
Old 09-12-08, 02:14 PM
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ok thanks
Old 09-12-08, 02:20 PM
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yeah....as soon as you said N/A turbo break up problem, I knew it had to be electronic some where.

I think the S4 TII ECU will work as long as you have S4 AFM and map. And you still dont have enough injector by the way. I was getting 13.4 Air Fuel ratios with the stock turbo and injectors. (no emissions at all and 3" DP - exhaust)
Old 09-12-08, 02:37 PM
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if i wiring in the T2 550 would that be enough for it
Old 09-12-08, 06:23 PM
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Originally Posted by b almer
if i wiring in the T2 550 would that be enough for it
If you wiring in?

If you have all 4 injectors itll be enough. Keep in mind that if you have an catless exhaust and 3 inch down pipe, your WILL over boost. It happends to me all the time (which is why I was reading 13.4 air fuel ratio) but if you dont over boost it should be enough too keep it safe.

But I can almost guarantee YOU WILL over boost. So instead of buying another set of stock 550cc injectors, just go head and upgrade. And port the wastegate some.
Old 09-12-08, 06:27 PM
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I didnt even notice that you have a V-mount....post more pics dude what are you doing!!?!!
Old 09-13-08, 02:34 AM
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i all ready had the set of 550 injectors and the reason i had that problem i found out was the way the maf was position

i will have the pics of the vmount up tomorrow cause i will have everything back together




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