Hi,

I installed a single and it's not boosting. Here is some info about my car:

I drop a streetported 13B-RE in my FC with the stock twins running in non-seq. They boosted fine and fast with a single 3" exhaust. When I fixed all the problems after the swap I installed a TO4R (P trim .96 A/R) with the racing beat turboback. The first few days I ran with the wastegate and the BOV disconnected (no vacuum source). I ran light throttle and I hit like 5 psi max. After I connected the wastegate and the BOV it started I had no boost. So I decided to unplug again the wastegate and the BOV to be sure that there is not leak from there... still no boost. So I though that the turbo could be the problem. I changed the turbo for a T66 (Q trim .96 A/R). I still have the same problem. So I guess the problem is not the turbo. I have absolutly no boost and the engine feels like it choke. My engine should spin that turbo easily right ?


I would like to have some idea of what could be the problem. Could it be a spark or fuel problem ? An engine problem ? Throttle plate not opening completly.

So far I have check the following:
The wastegate is not leaking at idle so I guess it's not leaking while running. I checked if there was anything that obstruct the air. I check for boost leak.

Any idea are welcome. I'm a bit desperate right now.

Thanks!

Alex

 

engine should spool turbo no problem.

what is controlling fuel and ignition?

cat on the car? could be clogged.

 

Major boost leak?

 

I use a haltech e6k. Steve Kan came to tune it about a month ago but the turbo has never boosted. I have the racing beat presilencer and not cat. I think I will disconnect the downpipe to do a test.

I really doubt about a boost leak because I pressure tested with an air compressor. There was a lot of boost leaks but I fixed them. The problem was still present.

 

Are you sure you got them all? Double check just in case because it sounds like it's a boost leak more then anything else. Check your intercooler too. My old intercooler had a hair line crack on one of the end tanks and I was barely seeing boost.

 

I will double check but I pressure tested with an air compressor at 10 psi and there was not leak. I used soap with water to found the leaks, it worked pretty well. After that I went for a road test and it was not boosting at all.

I will pay more attention to the IC, this is one piece I forgot to check.

 

I want to add that I saw 10 psi once with the TO4R for like 2 sec. In the same run I punched it again and it was not boosting. I don't know if this can help.

 

blew a hole in a coupler

 

No! I have retested for boost leak after that with the air compressor at 10 psi and it was not leaking.

Tomorrow I will do a run without the air filter, maybe it's too restrictive. It's a 4 inch K&N.

 

I seriously doubt it's the air filter. Your turbo is spooling, you're just not getting the boost that it is producing into your engine. Does your turbo have a vacuum nipple on the compressor cover? If it does I suggest you hook up your boost gauge vacuum line directly to it that way you can see if your turbo is boosting or not. You're basically going straight to the source, before any intercooler pipes, intercooler, or intake manifolds. Try that out.

 

Is your wastegate routed back to the downpipe or atmosphere? maybe the wastegate is fully open if you already changed your turbo. There's only so many things that could cause it. (I/C, piping, BOV, Wastegate, Turbo), any one of them has to be it.

 

This is a good idea. I will try to arrange something to get the boost after the turbo.

BTW I don't hear it spool at all.

 

Hi Steve, I'm the guy with the white FC from Montreal. Do you remember me ? You did some check up on my car when I add the exact same problem.

The wastegate is vented to the atmosphere.

 

if the wastegate is vented to the atmosphere you'd deff hear it dumping all the exhaust through there. It will sound like a massive exhaust leak at idle.

 

yes, I remembered you. I guess changing the turbo didn't make any difference. I honestly don't know why you car wouldn't boost at all. I think the car feels like there was a major leak somewhere causing not to build up. Another thing to do is to bypass your IC and run a temp pipe from turbo to your intake manifold and see if anything changed.

Looks like we just have to eliminate one thing at a time until we figure out the cause of it.

 

Ok guys, I found the problem. I feel so stupid. Before Steve came for the tuning I found scott towel in the IC inlet. I put that to block crap from entering into the piping while I was working on the car. I removed it, but tonight if found some others stuck in the inlet. There was probably some left in the top of the endtank of the IC and at the time I was not able to see it. It boosted a bit and them after it has probably dropped and blocked the whole IC inlet which cause to have boost problem. When I removed the pipe tonight I saw it. Maybe there is some left that I can't see so I will pull the pipe in the next few days to see if there is some remaining.

Sorry for losing your time guys. I will never used scott towel again to block the damn IC pipe from getting crap in it.

I lost a tuning day and a month because of a scott towel. But now I'm really happy, the T66 pulls hard and I'm only at 8 psi. I will also try the TO4R to compare with it.

Sorry again... I guess we learn from our errors.

 

This is'nt the first time this has happend. There was the one guy named 93BlackFD or something along those lines. Its been awhile ago... I remember something like he sucked one into his turbos, or engine, or something like that. Anyways, it could have been more costly and damaging. Glad it worked out for you in the end. CJ

 

Now spare your other turbo to me..h..h.

 

just for refrence for the next time 80% of the time is a boost leak somewhere bwtween intercooler pipes/ vacum lines & white smoke comming out of the exhaust pipe is a sign of a blown turbo

 

glad you figured it out. I knew it didn't have anything to do with your computer, fuel, or filter.

 

He put some of his pantyhose over the compressor as an, um, air filter and it got sucked through the system once he boosted

 

ahhh.. glad you found the problem. just becareful on the map until you get a wideband to verify your a/f ratio. I already redid the entire ignition map so there shouldn't be much to do afterwards. If anything, I can help you with the map once you get a wideband to monitor a/f. as for using a towel, I usually use disposible gloves for i/c pipe, that way nothing can be caught inside the piping.

 

Wideband read about 10.9-11.1 until 8 psi. I will datalog some run with the wideband soon. You told me that I should be safe for 16-17psi with the map you put in. This still true ?

Thanks!

 

yep, the map is good for 17psi on pump gas. 10.9-11.1 for 8psi is a little rich. You can actually lean out a bit but it wouldn't hurt to run it in that a/f range.

 

Thanks Steve! I will datalog soon. I will let you know.