3900 swap into Fiero

[IsaacHayes]

Cool I was waiting for some updates! Looks like your TB coupler clamp isn't on too straight! Wow not much room for the filter on the rear turbo! I see you are using a filter on the BOV, most people don't which isn't a good idea.

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[Joseph Upson]

Cool I was waiting for some updates! Looks like your TB coupler clamp isn't on too straight! Wow not much room for the filter on the rear turbo! I see you are using a filter on the BOV, most people don't which isn't a good idea.

Yes, it's not wise to run the blow-off valve without a filter unless you have one that somehow remains closed when not relieving pressure and has an air tight seal, otherwise you'll be sucking junk into the engine. In Atlanta the in the Spring the pollen count is rediculous and all over the engine.

Actually the forward filter sits the way it does because of a clearance issue, the aft has some more room available the way it is. I saw the TB coupler clamp when I posted the picture.


So far the corrections appear to be working fine, I thought I had a turbo problem but it looks like I was just burning off excess oil after the restrictor was installed since the remaned turbo appears to have stopped smoking.

Right now I'm have a problem with achieving a smooth acceleration; when the pedal is pressed the engine revs to about 3000rpm and cuts out to full lean on Zeitronix WBO2 data logger, if I pump the pedal it will rev so I have to find he table that's causing the problem and add fuel to it at that point.

[IsaacHayes]

AE table messed up maybe? Or are you saying when you hit it hard it's fine but if you come up slowly then it goes lean?

[Joseph Upson]

AE table messed up maybe? Or are you saying when you hit it hard it's fine but if you come up slowly then it goes lean?

You have it right, when the accelerator is pressed it revs properly up to about 2500 rpm and then immediately goes lean and nearly stalls unless I release or pump the pedal. It can be manipulated up to higher rpm but not in one continuous press of the pedal.

[IsaacHayes]

Ah well that should be easier to fix it's just running lean in certain tables. Just need to go through the normal tuning procedure. I take it you have not done much other than compensate for injector rates as far as tuning yet?

[Joseph Upson]

The injector rate was changed but I took a look at the "AE Async Pulse Multiplier Vs. Delta TPS" and I had changed it by considerably lowering the first half of it and considering it addresses the first 50% of acceleration I believe that's where the problem is since another table starts at 60% on representing WOT. I'll also have to lower the base pulse width to get rid of the tip in rich pump shot.

I didn't drive it up the road due to the acceleration problem but hopefully tomorrow will be able to get it to perform properly. It idles right at about 950 as programmed and the exhaust temperature never reached 800 deg F hoovering around 650 F going up to the 700 range when revving.

Still can't get that stupid Moates APU-1 emulator to datalog although it emulates but what good is that without being able to read the BLM.

[IsaacHayes]

The way I understand it PE is when you are in WOT, and AE is when you snap open the throttle quickly, it squirts more fuel so it doesn't go lean from the quick throttle opening.... But I'm no tuning guru.

Can you just run an ALDL cable and use that to data log??? That would require another serial port but you could use a USB adapter on one. If you do on the ALDL cable I'd advise a USB one or a powered aldl cable if using USB adapter as I'm not sure if the problems people have with the adapters is cause many of the cables steal power from the serial port to power the chip and the USB adapters likely don't work that way.

[Joseph Upson]

The way I understand it PE is when you are in WOT, and AE is when you snap open the throttle quickly, it squirts more fuel so it doesn't go lean from the quick throttle opening.... But I'm no tuning guru.

Can you just run an ALDL cable and use that to data log??? That would require another serial port but you could use a USB adapter on one. If you do on the ALDL cable I'd advise a USB one or a powered aldl cable if using USB adapter as I'm not sure if the problems people have with the adapters is cause many of the cables steal power from the serial port to power the chip and the USB adapters likely don't work that way.

That's the problem I mentioned earlier, I have all of that in the Moates emulator, it just refuses to connect and datalog with the 8F code so I have to rely on the back up Zeitronix WBO2 datalogger to monitor A/F

[Joseph Upson]

I finally solved the emulator problem at least most of it anyway, poor connection at the ALDL plug, driver was not updated although the computer said it was.

As mentioned under the computer section it appears I have a bad MAP sensor according to the datalog and finding that out at the last moment as was with the CPS sensor on a previous excursion I ran out of time again.
Hopefully the next trip months from now will be the charm

[JohnnyReb]

How are you doing with Moats? I always had good dealings with him. Seems unusual not to receive any support. When I 1st got my AutoProm USB I had all kinds of issues, all my fault but got plenty of help. I'm gonna blame my problems on a crappy users guide, LOL.