Fuel-related stalling issues?

Michael Blue · #1 10-10-2007, 03:27 PM

Hi there! I think I've made the very difficult decision not to sell the car. After driving the wife's Audi for 2 weeks I broke down and drove the SVX to work again this week - I couldn't believe how much I missed driving this car. There just isn't anything for under $15K that could begin to replace it for me, so I'm going to throw a mountain of money at it if necessary to make it "perfect" over the next year.

--

I'm still having stalling issues with my car (when warm; it does fine the first time you drive it after it's been sitting a while). I've replaced the coolant temp sensors and cleaned the MAF and only use good gas.

I was wondering if anyone had a shop manual for this car I could buy, or knew where I could get one.

I was also wondering if someone could diagram the fuel system for me - I'm looking for the fuel pump(s), the fuel filter(s) and the fuel pressure regulators.

Oh, and after my wonderful Eastern Ohio trans swap, the car is now leaving trans fluid puddles in the garage...
...If you know the situation, you who to blame, and who to avoid doing business with.

Thanks for all your help!

Wikedjuggalo · #2 10-10-2007, 05:03 PM

Quote:

Originally Posted by Michael Blue

Hi there! I think I've made the very difficult decision not to sell the car. After driving the wife's Audi for 2 weeks I broke down and drove the SVX to work again this week - I couldn't believe how much I missed driving this car. There just isn't anything for under $15K that could begin to replace it for me, so I'm going to throw a mountain of money at it if necessary to make it "perfect" over the next year.

--

I'm still having stalling issues with my car (when warm; it does fine the first time you drive it after it's been sitting a while). I've replaced the coolant temp sensors and cleaned the MAF and only use good gas.

I was wondering if anyone had a shop manual for this car I could buy, or knew where I could get one.

I was also wondering if someone could diagram the fuel system for me - I'm looking for the fuel pump(s), the fuel filter(s) and the fuel pressure regulators.

Oh, and after my wonderful Eastern Ohio trans swap, the car is now leaving trans fluid puddles in the garage...
...If you know the situation, you who to blame, and who to avoid doing business with.

Thanks for all your help!

why do you automatically jump to fuel stalling it? My brothers fuel pump went on his crappy nissan and once it did, there was not starting it. My mustang's transmisson is bad in it and when you shift into Reverse or Drive it would stall the engine. Not saying it is that, but you did say something about the transmisson leaving fluid. Not very qualified person here.

Manarius · #3 10-10-2007, 05:04 PM

Did you replace the MAF with a known good one? Cleaning was a good step, but I'd want to test it by testing a known good one.

Wikedjuggalo · #4 10-10-2007, 05:15 PM

Quote:

Originally Posted by Manarius

Did you replace the MAF with a known good one? Cleaning was a good step, but I'd want to test it by testing a known good one.

MAF seems to be a common stalling problem.

Trevor · #5 10-10-2007, 05:33 PM

Most factors involving idling are controlled by the By Pass Air Control Valve and the Auxiliary Air Control Valve. Several flexible tubes are involved which deteriorate and can cause air leaks.

You will be wise to get hold of a set of manuals. They will save you a lot of money in the long run. Try the wanted to buy feature here, as a first option.

Michael Blue · #6 10-11-2007, 03:12 PM

Quote:

Originally Posted by Trevor

...By Pass Air Control Valve and the Auxiliary Air Control Valve.

Where are these located?

Quote:

Originally Posted by Trevor

Several flexible tubes are involved which deteriorate and can cause air leaks.

This is the stuff that scares me. Since the trans swap is recent, and the rest of the work was substandard, I have NO faith in how these would have been put back together.

Quote:

Originally Posted by Trevor

You will be wise to get hold of a set of manuals. They will save you a lot of money in the long run. Try the wanted to buy feature here, as a first option.

Will do, THANKS!!

sd2649 · #7 10-11-2007, 09:41 PM

the Bypass Air Control Solenoid Valve is located on the bottom of the throttle body. The Auxiliary Air Control Valve is located under the drivers side of the intake manifold. All good info on these is found here:

http://www.subaru-svx.net/forum/show...&highlight=iac

If you feel like taking the intake manifold off to check this stuff out, the how-to write up from ECUTUNE's Supercharger has some pics of the underside of the intake manifold. BTW, it's really not that much of an ordeal to take it off, at least not compared to other engines I've done:

http://www.ecutune.com/Supercharger-Instructions.pdf

This pic shows the vaccum lines better

http://www.subaru-svx.net/photopost/...&size=big&cat=

Good Luck!

Manarius · #8 10-10-2007, 05:52 PM

Quote:

Originally Posted by Wikedjuggalo

MAF seems to be a common stalling problem.

When my MAF failed on my Legacy, my car drove like utter crap. Eventually, it got so bad that the car would start and just shut right off again.

Wikedjuggalo · #9 10-10-2007, 06:21 PM

Quote:

Originally Posted by Manarius

When my MAF failed on my Legacy, my car drove like utter crap. Eventually, it got so bad that the car would start and just shut right off again.

I mean people have problem when stopping it will stall but start back up right?

Mr.EG33 · #10 10-10-2007, 08:35 PM

Well if it was a fuel pump it would also be hard to start, not only stall.. So like the others said you might wanna do the MAF as well ( replace known good with possible bad to rule out scenarios )

If that doesn't work what Trevor said sounds like another great option...

If you wanna check fuel ( if it will run for a while ) drive it with a fuel gauge in it coming out the hood ( in a safe place ) and watch the fuel pressure to see if it drops / fluctuates too much.

Ps: If its hard to start; cycle the key a few times (without starting it) to build up fuel pressure, it might be a weak pump thats on its way to dying

You will figure this out

wannarace928 · #11 10-14-2007, 09:04 PM

Quote:

Originally Posted by Michael Blue

Oh, and after my wonderful Eastern Ohio trans swap, the car is now leaving trans fluid puddles in the garage...
...If you know the situation, you who to blame, and who to avoid doing business with.

You mentioned it first.... and I believe enough people where affected by this situation and involved for you to know that someone was bound to comment on it.

In either case, good luck getting your car fixed. I learned quickly that there is no "budget SVX" only a Budget for an SVX. Everyday you drive it, something else is likely to go wrong. The car is after all 15 years old, hoses get old, parts break.

But they sure are fun when they are working!!!

It's Just Eric · #12 10-14-2007, 10:08 PM

rough idle and stalling issues can be hard to track down. My friends svx has similar symptoms as yours...so Im following the thread as best I can But only the parts between ohio bull****