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#1 Spooled_Starion

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Posted 24 June 2018 - 01:12 PM

So since I got the car I've had a low/no power issue. Boost gauge shows 7psi in first and second, up to 10 in 3rd yet the car doesnt accelerate any faster or harder when boost kicks in. She has almost no torque and wants to stumble upon takeoff. Oddly enough the other day at a stop light I went to take off, she stumbled really bad then took off like a bat out of hell, full boost, full power, felt like that's how she should be running. Shortly after that brief 10 seconds of fame she was back to her normal ways of stumbling, no torque, no power under boost. I'm in the process of building a boost leak checker for the inlet of the turbo so I'll repost what I find. I've check for vacuum leaks with starting fluid. Gave her new plugs and wires. Checked compression (roughly 110 across) reset isc via the thread, changed the cts, attempted to check timing but cant find the notch on the crank pulley, did the tongue test on the vac advance, nothing seems to help I'm kinda stuck at this point and any input would be appreciated. Thanks.

Edited by Spooled_Starion, 24 June 2018 - 01:21 PM.

Hks Downpipe, hks exhaust, hks intake, hks camshaft, hks pfc-fcon, hks fcd, hks turbo timer, trilogy injectors, mk1 short shifter, GReddy traditional shift knob, 89 ecu, Hks Boost gauge, innovative wideband A/F gauge.





#2 croquest87

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Posted 24 June 2018 - 01:25 PM

That notch is on your crank pulley. Clean it up all good you will see it. It's on the back of it.Much easier to look for it from under the car. Once you find it use flat screwdriver to scribe dirt out of it and clean again. Done. Timing needs to be at 10 deg or no power. I set mine around 11-12 for little extra response.

#3 Spooled_Starion

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Posted 24 June 2018 - 11:14 PM

I was able to pick up a mas fron a local guy who had an extra one, runs a *bit* better, smoother I guess. *slightly* better power under booat but still not where it should be.
Hks Downpipe, hks exhaust, hks intake, hks camshaft, hks pfc-fcon, hks fcd, hks turbo timer, trilogy injectors, mk1 short shifter, GReddy traditional shift knob, 89 ecu, Hks Boost gauge, innovative wideband A/F gauge.

#4 Spooled_Starion

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Posted 25 June 2018 - 12:31 PM

Got a big portion of it figured out today and got a good amount of my power back. Turns out inside of my hks pfc fcon ecu is a tiny adjustment knob for adjusting fuel. Well, the PO had that knob turned up quite a bit, turned it down to 0, which is stock. And now i have power under booat again. I'm going to fiddle with it a bit more as now she likes to miss under boost a bit now, but at least I'm making progress.
Hks Downpipe, hks exhaust, hks intake, hks camshaft, hks pfc-fcon, hks fcd, hks turbo timer, trilogy injectors, mk1 short shifter, GReddy traditional shift knob, 89 ecu, Hks Boost gauge, innovative wideband A/F gauge.

#5 Spooled_Starion

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Posted 25 June 2018 - 04:27 PM

Since I got the ecu overfueling issue mostly figured out and can once again make boost in 2nd gear only now. I notice that if I ease into the boost about 1/2 throttle it boosts strong and consistent in 2nd gear but if I just put my foot to the floor she misses under boost and accelerates slower then if I just ease into the boost at less throttle. I also cant seem to make boost in any other gear without is sputtering and missing at anything over 5psi Any ideas?

Edited by Spooled_Starion, 27 June 2018 - 05:24 PM.

Hks Downpipe, hks exhaust, hks intake, hks camshaft, hks pfc-fcon, hks fcd, hks turbo timer, trilogy injectors, mk1 short shifter, GReddy traditional shift knob, 89 ecu, Hks Boost gauge, innovative wideband A/F gauge.

#6 Spooled_Starion

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Posted 27 June 2018 - 05:25 PM

Bump. Still trying to figure this out, any help would be appreciated.
Hks Downpipe, hks exhaust, hks intake, hks camshaft, hks pfc-fcon, hks fcd, hks turbo timer, trilogy injectors, mk1 short shifter, GReddy traditional shift knob, 89 ecu, Hks Boost gauge, innovative wideband A/F gauge.

#7 speedyquest

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Posted 27 June 2018 - 07:26 PM

One of the big issues with helping is your using a piggyback setup and that adds a whole new level to your issues. If we were talking about a completely stock car there may be a few things we could suggest but like your other problem you figured out shows, you just don't know if its something original to the car making it run poorly or your pfc fcon making it run oddly.

Is there any way you could put it back to stock, diagnose your issues and get it running properly in stock form first?

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#8 croquest87

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Posted 27 June 2018 - 07:52 PM

Perfectly said speedyquest!  See if you can go back to stock.If not familiar w your piggy back read up on it if possible.

There are better ways to run that car.Like Scott87stars plug and play system set up for tbi and if you ever go mpi you can use the same system for two extra injectors or stand alone w new harness  something more user friendly!

Edited by croquest87, 27 June 2018 - 08:23 PM.


#9 Spooled_Starion

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Posted 27 June 2018 - 07:59 PM

I have the pfc set to "0" which is the "stock" setting according to the pfc manual I found online. I removed the pfc and tried to start the car and it wont start without the pfc plugged in. Aside from pulling some of if not all of the dash out and attempting at removing it completely I think I'm stuck with it. My mods are in my sig if that helps as well. Thanks for the input.

Edited by Spooled_Starion, 27 June 2018 - 09:29 PM.

Hks Downpipe, hks exhaust, hks intake, hks camshaft, hks pfc-fcon, hks fcd, hks turbo timer, trilogy injectors, mk1 short shifter, GReddy traditional shift knob, 89 ecu, Hks Boost gauge, innovative wideband A/F gauge.

#10 importwarrior

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Posted 28 June 2018 - 08:37 AM

Clogged catalytic converter...… or it is blocking the exhaust flow.

Try driving the car with out the CAT if pssble.

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#11 Spooled_Starion

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Posted 28 June 2018 - 03:29 PM

No cats on this one.
Hks Downpipe, hks exhaust, hks intake, hks camshaft, hks pfc-fcon, hks fcd, hks turbo timer, trilogy injectors, mk1 short shifter, GReddy traditional shift knob, 89 ecu, Hks Boost gauge, innovative wideband A/F gauge.

#12 Turbo Cary

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Posted 29 June 2018 - 05:23 AM

Check fuel pressure. Get a gauge and tape it to the windshield then see if it falls off while accelerating. I had a weak pump that would run the car at idle but wouldn't go over 2k rpm. Turns out the pump was bad, sock clogged, and the fuel filter was clogged. Replaced all 3 and improved the wiring for the pump by redoing the fuel pump harness and ground.

#13 Spooled_Starion

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Posted 30 June 2018 - 02:09 PM

I dont know if I should replace it or just skip testing fuel pressure and just replace the pump as now it is starting to get a loud hum to it and has probably never been changed. Plus with my issue I'm having and with the loud noise the pump is now making I'd say it's a good place to start. I dont really want to modify the fuel system tophat or cut the fuel line to check pressure.

Edited by Spooled_Starion, 30 June 2018 - 03:19 PM.

Hks Downpipe, hks exhaust, hks intake, hks camshaft, hks pfc-fcon, hks fcd, hks turbo timer, trilogy injectors, mk1 short shifter, GReddy traditional shift knob, 89 ecu, Hks Boost gauge, innovative wideband A/F gauge.

#14 tsi_tom

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Posted 30 June 2018 - 03:26 PM

Many have had problems with Trilogy injectors. I don't know why people keep using them.
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Stock injection system

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#15 croquest87

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Posted 30 June 2018 - 03:49 PM

I bought a brand new set of 650 primary and 950 secondary Trilogy injectors about 2 years ago right from the start car would run like absolute crap got to the point where I just pulled them out put stockers back in and all was okay again  Last summer I decided to use my translator  and 3-inch GM mass air just to see if I can tweak them. They worked perfect as l was able to adjust.  Also have a set of fuel injector Clinic  650 950 injectors  they work perfect at all rpms. But in my opinion you should use the translator on any size injectors including stockers along with afr gage for best results. It simply makes sense.

#16 tsi_tom

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Posted 30 June 2018 - 03:52 PM

People also have problems the the translators.  Need to start with a stock system then upgrade.
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20 over forged pistons
Stock injection system

My restoration project: The Missouri Project

#17 croquest87

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Posted 30 June 2018 - 04:52 PM

View Posttsi_tom, on 30 June 2018 - 03:52 PM, said:

People also have problems the the translators.  Need to start with a stock system then upgrade.
Very true!

#18 Spooled_Starion

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Posted 01 July 2018 - 12:21 AM

View Posttsi_tom, on 30 June 2018 - 03:52 PM, said:

People also have problems the the translators.  Need to start with a stock system then upgrade.

I've already swapped back to a stock MAS setup.

View Posttsi_tom, on 30 June 2018 - 03:26 PM, said:

Many have had problems with Trilogy injectors. I don't know why people keep using them.
They came in the car when I purchased it I dont have any others to swap out or I would.

Edited by Spooled_Starion, 01 July 2018 - 09:29 PM.

Hks Downpipe, hks exhaust, hks intake, hks camshaft, hks pfc-fcon, hks fcd, hks turbo timer, trilogy injectors, mk1 short shifter, GReddy traditional shift knob, 89 ecu, Hks Boost gauge, innovative wideband A/F gauge.

#19 Turbo Cary

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Posted 01 July 2018 - 08:07 PM

Don't skip on diagnostic steps and don't just throw parts at a car. Do the fuel pressure test like I stated above. If you skip steps or throw parts at the car you'll be wasting time and money.

#20 Hoosierquest

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Posted 04 July 2018 - 05:23 AM

Yeah I would start with fuel pressure.
Also double check the size of your injectors. If trilogy they should be marked with etching on the injector body
If not you can pull them and look at the holes at the injector outlet to at least make sure they are 2 different sizes.
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