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Replaced blown intercooler pipe, runs terribly NO BOOST LEAKS

yubh8tn

Well-known member
Joined
Aug 21, 2019
Messages
149
Location
coeur d alene, idaho
I know what you're thinking. I have a boost leak, you're gonna say. BUT I DONT. I tested and it's holding 20psi just fine. The problem is very weird because it is running rough on idle, runs fine at cruising speed, but bogs like i blew an intake pipe when I floor it and the turbo is spooling 1-2k rpms later than it did with the factory hose.

I replaced the pipe with a homemade radiator hose setup and it ran just fine except it took forever to spool, so I tested for leaks, it had one, and changed how I had it connected to the intercooler. Now its running terribly but holds boost. The check engine light comes on during pulls and there's a loud ticking sound that scales with RPMS near/around the intake manifold.

I know you guys can't do much without being with the car and seeing what I did, but any guesses would be appreciated. Thank you
 
Last edited:

mooserage

Staff member
Joined
May 17, 2004
Messages
1,270
Location
Seattle, WA
By RPMS, do you mean the CAS?
cas-greenlid-late.jpg
 

CutlassJim

Well-known member
Joined
Jul 17, 2006
Messages
1,694
Location
Manchester, NH
Did you leave a rag in one of the pipes? /ubbthreads/images/graemlins/hsugh.gif

Ticking sound could be the PCV valve clacking away. I used to get that at idle sometimes until I deleted it.
 
Last edited:

gvr4ever

Well-known member
Joined
Aug 6, 2002
Messages
6,026
Location
central Indiana
Also sounds like horrible lifter tick. Double check oil level.

At your own risk. Unplug the knock sensor with SAFE boost, and see if it runs better.
 

yubh8tn

Well-known member
Joined
Aug 21, 2019
Messages
149
Location
coeur d alene, idaho
No rag!! lol. The knock sensor is brand new OEM but its from a 1.8L Galant, according to a few various sites they're the same though. On top of that I got it tuned with that knock sensor installed and there wasn't a problem until I messed with my intercooler pipe.

Oil level is fine but I could add a bit more, PCV valve is brand new but I guess it could be that.

I guess I didn't make myself clear, the ticking sound and CEL are new. They didn't start until I changed the intercooler pipe. I'm going to revert the pipe to the busted one that I taped together and see if it runs correctly again. If it does then I know the bogging and weird idle were due to how I connected the hosing. Hopefully the ticking and CEL go away with that fix.... /ubbthreads/images/graemlins/uhh.gif/ubbthreads/images/graemlins/uhh.gif
 
Last edited:

gvr4ever

Well-known member
Joined
Aug 6, 2002
Messages
6,026
Location
central Indiana
Lifter tick can trip the knock sensor and enough knock can trip a CEL. Not saying that's what it is, but it could be a new symptom that is unrelated to your changes. Going back to how it was before you had a problem is a good choice, but I don't see how a IC and intake noise could be related. Hopefully something wasn't in the pipe that got sucked into the intake. Maybe do a compression check.
 

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