Howdy guys/gals. Im new to the board but have been a subaru addict ever since I've started driving. Im on my 10th subaru right now. I had a 86 3 door hatchback:with many mods including, a 1st gen DSM intercooler. At this time I found my baby and plan on doing this one right. I have a 88 Subaru GL: 5speed,push button 4WD,1.8T,red,wagon. Im so glad I found this website, cause NASIOC was just not too intune with these old school stuff. I'm making an intake right now and am having some problems with the hot wire type MAFS. I had the vane style on my 86 and that didn't react to my PVC pipe intake so drastically. I think I have the problem isolated to that the bend in the intake pipe is to extreme and is casing the MAFS to give bad readings due to "turbulent"air. Does this sound about right to your guys?

$J

Welcome to tbe best littl' old Gen Subaru board on the Inet

 

Please describe your problem in a bit more detail.

With the boost pressure set at 10 psi you will experience fuel cut if you hold it at this pressure for more than several seconds.

 

As to answer you question on turbulent air and a confused MAF output signal, well I guess it could happen but I ran a blunt 90 degree intake adapter for thousands of miles with no problem.

I have since moved my K&N into the inner fender (between the inner fender and plastic inner fender liner) area and have a straight shot. This pulls much cooler air with no restrictions in the plumbing.

Once again welcome to USMB

Originally posted by Skip

$J

Welcome to tbe best littl' old Gen Subaru board on the Inet

 

Please describe your problem in a bit more detail.

With the boost pressure set at 10 psi you will experience fuel cut if you hold it at this pressure for more than several seconds.

 

As to answer you question on turbulent air and a confused MAF output signal, well I guess it could happen but I ran a blunt 90 degree intake adapter for thousands of miles with no problem.

I have since moved my K&N into the inner fender (between the inner fender and plastic inner fender liner) area and have a straight shot. This pulls much cooler air with no restrictions in the plumbing.

Once again welcome to USMB

 

Thanks for the welcome. The problem is when I get on the gas and get the at above 3grand in RPMS then it begins to chug or feels like it cuts out. How can I be rid of this problem? It seems that I must deal with this electronically, since I have a 88 or newer car. On my 86 I just pluged off a black film canister looking thing and she ran great.

HI $J..... Welcome to the USMB!!!!!! I for one dont know anything about the Subaru working end but I drive mine and play hard and Chef Tim fixes them for me... LOL as you will see there are alot of really smart guys on here with skip being one of them as well as alot of others... Again Welcome!!!! Vicky

Originally posted by Vickaroo

HI $J..... Welcome to the USMB!!!!!! I for one dont know anything about the Subaru working end but I drive mine and play hard and Chef Tim fixes them for me... LOL as you will see there are alot of really smart guys on here with skip being one of them as well as alot of others... Again Welcome!!!! Vicky

:wave:

Are U @ 10psi of boost by 3000RPM? If so I would say it's the fuel cut off sys. Is it only when U get on it hard that this hapens, or even when U are drivin' it eazy? I know I can get mine up to 11-12psi by 3000RPM EAZY!

Welcom to the board, TURBOS ROCK:headbang:

Werd up J Money!

 

Glad to have a new member that brings some past experience to the table.

 

See you around the USMB!

J,

The "chugging"? Is it constant above 3 grand or a on/off type of feel?

Where is the air fuel meter sitting when this happens?

 

Have you tried resetting the boost to below 8 and trying it ?

 

If it is going lean when it chugs I'd suspect a partially plugged fuel filter. Possibly dirty injectors.

Good plugs and wires are an obvious I hope, have you had the s. plugs out lately?

Welcome to the board. You are in the right place to find solutions to your problem(s). Many knowledgable people here. The more details you can give them, the easier it is for them to give good advice.

Sorry I can't help you, I'm totally lost on Turboed engine systems. Never owned or worked on one. But I'm a looking.

Check your MAF, I know on my 87 Turbowagon if I unplug the MAF it won't rev over 3500 RPM. Your MAF could be toast and your computer is in "limp mode"

 

The MAF is the sensor that is attached to your air cleaner box, you still have that sensor right??

I got the problem fixed now, it was the damn bend in my intake piping that was messing things up. I got her running real good now. Now it's time for some valve cover gaskets and a new rack and pinion.