Turbo Woes

[RedFR-s]

I've had just about every problem under the sun with this damn turbo. the fuel pump was a nightmare to get it (I'm not sure it's in properly), the car went into limp mode on the drive home from my tuner which I though was my pump failing. It wasn't the pump, one of the coolant lines over heated and blew spewing my coolant everywhere. engine overheated and cut, luckily no damage. Put on appropriate lines and no similar issues since.

The car is hesitating under load. I'm waiting to get a wideband installed so I can figure out if it's lean or rich, but I'm thinking starvation. I took it to a shop (way to frustrated to trust myself at this point) and they are saying pump and injectors are good and it's a tune issue.

Driving home from a car show this week I had major hesitation and rough idle causing a stall. One of the vacuum lines failed causing a vacuum leak. I was hoping this was the main issue, but the vacuum leak is fixed and I'm still getting hesitation under load.

I'm using a tune that was on this kit on another car that worked perfectly. I'm out of ideas at this point. I've got my tuner saying its mechanical and my shop saying its the tune.

I did find a loose v-band, but its connecting the wastegate pipe to the waste gate, so it should have any impact on the AFR. I can't get at it with the tools I've got right now without taking some major parts off the car.

http://www.ft86club.com/forums/showthread.php?t=92601

Found this thread, and I think my issue is identical but not sure what the tune changes were though. My tuner came highly recommended from other 86 owners running all kinds of boosted applications. Mine was tuned on a dyno.

My car ran perfect with no symptoms this morning (ambient air was 15degC vs usual 30degC and I dull pulls to 120kmph WOT after about 10min of driving as opposed to merging on a freeway after about 20min of driving. Starting to think it could be heat related.

Sorry for the long post, I'm looking to get as much insight as I can as I'm at the end of my rope with this project.

[mrk1]

This is one of those cases that's extremely hard to diag with out seeing it. My guess would be something mechanical throughing the tune off. It's often best to just get a second set of eyes on the car, see something your missing. Who did the initial install?

[RedFR-s]

I did the original installation. I took it to the shop for the second look but they are pretty much at the same point as me. I have a buddy who's done FI before who's gunna help me look it over as well

[mrk1]

You say the tune is from a previous car, are you sure you have the exact same setup? Brand and size of injector, fuel pump, MAP sensor that sort of thing.

[nickmerronesucks]

Originally Posted by mrk1

You say the tune is from a previous car, are you sure you have the exact same setup? Brand and size of injector, fuel pump, MAP sensor that sort of thing.

Plus who knows if that tune worked out well for previous owner..probably blew his car up, thats why he sold the kit.

[GsxrMe]

Can you please post the turbokit brand, The turbo model used and other really helpful information? Like complete mod list on the car.

[enjetek]

How could there be so many part failures? You need to address that first before you can start saying it's the tune. Furthermore you couldn't save up a little more money for a couple diagnostic tools to help see what's going on - afr gauge etc? This was going to be an expensive process so I suggest you be more generous with your money after you see all the mechanical issues are addressed. Was this your first big install of parts and why didn't the shop see these potential issues?


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[Sammakko]

button up all the half assed stuff,then get it tuned by a pro...

[RedFR-s]

Originally Posted by mrk1

You say the tune is from a previous car, are you sure you have the exact same setup? Brand and size of injector, fuel pump, MAP sensor that sort of thing.

I bought the whole kit from my buddy and went to the same tuner. He ran it with no problem for 2 years. The only difference is he had the DW265 pump and I have the AEM 5210 pump.

Here's the relevant parts list
FA20 Club Turbo kit @ 7psi spring loaded BOV
AEM Meth injection kit 50/50 mix
AEM 5210 310lph fuel pump
Stock injectors
Perrin full exhaust
Omni 3 bar MAP sensor

Running on 94 octane

[RedFR-s]

Originally Posted by Sammakko

button up all the half assed stuff,then get it tuned by a pro...

It was tuned by a highly recommended and respected tuner used by various performance shops in my area.

[Sammakko]

Originally Posted by RedFR-s

It was tuned by a highly recommended and respected tuner used by various performance shops in my area.

what fuel are you running?

[RedFR-s]

Originally Posted by nickmerronesucks

Plus who knows if that tune worked out well for previous owner..probably blew his car up, thats why he sold the kit.

I know the previous owner well. He sold the kit as he is changing platforms for racing. He loved the kit while he had it.

[WHITE]

What mixture % of water meth are you running? And how is it being triggered?

[RedFR-s]

Originally Posted by enjetek

How could there be so many part failures? You need to address that first before you can start saying it's the tune. Furthermore you couldn't save up a little more money for a couple diagnostic tools to help see what's going on - afr gauge etc? This was going to be an expensive process so I suggest you be more generous with your money after you see all the mechanical issues are addressed. Was this your first big install of parts and why didn't the shop see these potential issues?


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Thanks tips, your assumptions are super helpful.

I'm not blaming my tune, I suggesting it as a possible cause. I was under no false pretenses that this would be expensive. I've bought a wideband and am awaiting shop time to get the bung installed.

The coolant line failure I can't explain as the set-up was exactly what was used by the previous owner. I still have to get exact details from my shop on the vacuum line issue.

This was my first big install and I have turned to this community to learn and ask for help, not be mocked and ridiculed. That isn't the point of these forums.