89 silvia coupe w/sr20det wont idle with intercooler hooked

[silviacoupe13]

ok so i got this car not too long ago and it dosnt want to idle so i replaced the plugs checked the wires and injectors all good i took the intercooler piping off the intake and it ran perfect blow off valves working good torbo seems to be working good but when i hook the piping up the car idles really rough and then dies but runs good at 3000 rpms and up trying to fix this so i can drive my car any advice would really help i dont know where to go from here

[Eikon]

i'm confused.. So with the piping hooked up properly with no leaks, it runs terrible? But with the piping wide open to the air it runs great? Seems to be the opposite of what you'd expect.

I wonder if you have a bad MAF? But typically people who have a bad MAF have the opposite symptoms.. usually they run fine up to 3000 rpm's and then bad over that.

Everything you are talking about sounds backwards..

Can you double check the wiring on your MAF? I wonder if something is crossed up..

Wish i was more experience with SR motors and could help more..

[silviacoupe13]

I went threw it has oil in the intercooler im guessing its a bad turbo but it was boosting good and everything so im not sure it has some shaft play but was boosting to 14 pounds good im not really sure its my first sr so im trying to figure it out but the oil was the idle problem now i have to figure out if its the turbo or somthing else

[Eikon]

wow.. can you do me a favor and try using some punctuation in your sentences? I know it's the internet and all, but its hard to read your parasentences.

[Lobo240sx]

Does it smoke when you start accelerating/hitting boost out the tailpipe? When you sit at a traffic light is it smoking at idle?? If it is an original T25 SR probably a bad seal.

[silviacoupe13]

It is im trying to find another turbo now

[PyR0NiAk]

Eikon, thanks for stepping in this thread and helping out while I was away.

[rc1honda]

It is im trying to find another turbo now

Well boosting a t25 at 14psi is never a enlightened idea. 14psi with a stock t28 is still pushing it. That oil could very well be blow by as well. If i were you i would do a compression check first and foremost. If the numbers are good then do the turbo.

Your are having a very strange symptom. I have never heard of this symptom being associated from a bad turbo but anything is possible. Check compression, check turbo and check maf and see where your at when the dust settles.

And keep the t25 at 10/11 psi and the t28 at no more then 14. You could go higher but your are just pushing hot air, and will change turbos as often as you change oil.

[silviacoupe13]

im upgrading to a t28 car has good compression intercooler was full of oil so when it was reved it was blowing the oil right threw when it wasnt it was like it was choking it out ill let you know as i find out more thanks for all the help