Jump to content
Ultimate Subaru Message Board
DaveT

87 GL EA82 wagon - new to me running problem

Recommended Posts

Another update.  The new pump is hooked up fuel line wise.  I'll add pictures once it's mounted and wired.  

Share this post


Link to post
Share on other sites
58 minutes ago, Silas Cruse said:

Which pump , part number did you go with ?

I got a Carter P5000.

Share this post


Link to post
Share on other sites

The Bosch generic EFI external fuel pump ending in 070 is a common one for people and Dunes. I got a 910 ending Bosch part number. Very heavy made in Czech. Waiting on inline prefilter

Share this post


Link to post
Share on other sites

Just experienced a FP failure 2 days ago, fortunately right in my driveway. Week & half before was first instance but didn't think of a pump at first as the starter wasn't engaging to restart engine. Cranked the cold engine over, engine would rev up to about 2K rpm then die. One cell in battery was a little low so I thought maybe my 10mo old battery had a shorted cell perhaps.

Charged the battery after topping up the cells, load test showed battery good. Hmmm........on a hunch looked to FP & sure enough pressure was much lower than 50psi with return line pinched off. Didn't bother testing running fuel pressure - went right to replace FP. And filter. Wix 33471.

Vaguely recall that FP was replaced some 6-7 yrs ago(this is my 87 EA82 SPFI car BTW). Replaced the Airtex E8312 with a Carter P70304(made in USA) that I had squirreled away in the garage.

BTW. Driving down 15 fwy last month noticed intermittent power loss on steep uphills & reduced power as well before this complete FP failure. 

Edited by czny

Share this post


Link to post
Share on other sites

I should have a chance to get a test run in over this weekend.  The only thing left to do now is solder the 2 wire from an old Subaru connector to the new Carter connector.  A whole list of other things going on has been making my progress on this a bit slower than typical.

Share this post


Link to post
Share on other sites

Test run done.  It's not the fuel pump.

Last night, I ran the new pump, pressure looked good,etc.
Today, I started the car and the pressure was bopping up and down again, 20 to 22 PSI.  Ran great and normal, until I got it warm and decided to take the bigger risk of a main road with a steep uphill grade, when the sputtering began under load.  Made it home ok at least.

Debating next move...  Swap the pressure regulator, or the injector?

I installed the Carter P5000 in the space between the rear set and the floor, so it is not in the weather.
 

Fuel Pump34.jpg

Share this post


Link to post
Share on other sites

Mine is also an 87 SPFI GL for comparison.

Few yrs ago had the crank angle sensor in distributor start giving out. Car would cut out under lighter loads as things got worse. Swapped distrib & all was good then. Crank angle sensor was failing. ECU codes 11 & 13.

 

Share this post


Link to post
Share on other sites

OK!  I replaced the fuel pressure regulator.  I have a spare SPFI manifold I traded for the carburetor one I had on my 86 GL.  Took the regulator off that spare one, which looks like it wasn't very old / low miles  /indoors most of it's life.

Car fired right up.  Pressure nice and steady, at 24PSI - which is a little high.  Drive to the bottom of my safest "test" hill.  Checked the vacuum line to the bottom of the pressure regulator, oops, I left it off.  Connected.  Pressure more normal 22PSI.   Still nice and steady.  Drive up the hill, NO PROBLEM!   Loop around for another test, and no problem.  Took a run up the steeper bigger higher speed hill nearby, and no problem.

Pressure now at 20PSI, but it is running fine as it always has.

  • Like 3

Share this post


Link to post
Share on other sites

Ah that satisfying feeling when you finally nail an issue like this one!

So, what's next?? :P

Cheers

Bennie

Share this post


Link to post
Share on other sites

hmmmm....   Well, I probably should investigate what is wrong with the bad regulator, and figure out what to do to fix it.  Since I have no doubt that they are NLA, since the fuel pumps are NLA.

 

Other thing to note - The stock pump draws less than 1.5Amps, and the Carter P5000 draws a hair over 5Amps.

Share this post


Link to post
Share on other sites
On 7/7/2018 at 8:56 PM, DaveT said:

OK!  I replaced the fuel pressure regulator.  I have a spare SPFI manifold I traded for the carburetor one I had on my 86 GL.  Took the regulator off that spare one, which looks like it wasn't very old / low miles  /indoors most of it's life.

Car fired right up.  Pressure nice and steady, at 24PSI - which is a little high.  Drive to the bottom of my safest "test" hill.  Checked the vacuum line to the bottom of the pressure regulator, oops, I left it off.  Connected.  Pressure more normal 22PSI.   Still nice and steady.  Drive up the hill, NO PROBLEM!   Loop around for another test, and no problem.  Took a run up the steeper bigger higher speed hill nearby, and no problem.

Pressure now at 20PSI, but it is running fine as it always has.

There are a few pressure regulators going to the throttle body. Did you replace them all or just the one with the vacuum line that mounts on the throttle body?

I picked up a spare throttle body myself with all pressure regulators attached. 

I also swapped my fuel pump with no change. 

I'm thinking pressure regulators are to blame as well.

Will report back when mine is fixed.

This might become the next regular repair for bad acceleration.... :(

Share this post


Link to post
Share on other sites

More than one fpr ? cannot think why ..... maybe the extras are dampers not pressure regs ?

 

Ebay is full of adjustable fpr with gauge/ Rock also do them for mpfi and turbo which run at about 36 psi

Share this post


Link to post
Share on other sites

There is only one fuel pressure regulator, it is held onto the throttle body by 2 screws.

The only thing I can guess you may be misidentifying are the dampers - they smooth pulses / surges in the pressure.  There is one on each line under the hood, and one on the OEM fuel pump.

 

Good to know, about the adjustable ones.  They go inline?   Then I just have to figure out how to make the dead stock one go full open?

Share this post


Link to post
Share on other sites
16 minutes ago, DaveT said:

There is only one fuel pressure regulator, it is held onto the throttle body by 2 screws.

The only thing I can guess you may be misidentifying are the dampers - they smooth pulses / surges in the pressure.  There is one on each line under the hood, and one on the OEM fuel pump.

 

Good to know, about the adjustable ones.  They go inline?   Then I just have to figure out how to make the dead stock one go full open?

Was thinking something similar. Cut pres reg can off mounting plate, weld/silver solder fpt fitting to plate & screw in 5/16" hose barb. Insert external pres reg in return line. 

  • Like 1

Share this post


Link to post
Share on other sites
10 hours ago, DaveT said:

There is only one fuel pressure regulator, it is held onto the throttle body by 2 screws.

The only thing I can guess you may be misidentifying are the dampers - they smooth pulses / surges in the pressure.  There is one on each line under the hood, and one on the OEM fuel pump.

 

Good to know, about the adjustable ones.  They go inline?   Then I just have to figure out how to make the dead stock one go full open?

Ah! Yes I was misidentifying the dampers.  When searching through images with the search "fuel pressure regulators 88 GL" it shows both the dampers and the FPR.

I thought they were all FPR. Thanks for correcting me.

I'll be swapping mine tonight and will report back if it fixes my issue.

Share this post


Link to post
Share on other sites

Bad things come in threes. Dam that Murphy........................!

Pres reg on my 87 Gl wagon (also EA82 SPFI, Dave) failed causing stumbling/dying immediately after startup. Luckily right in my driveway. 

I had already done the fuel pump a week before. Had some spare TBI bodies to rob a reg from.

Share this post


Link to post
Share on other sites

That's not what I want to hear Dave... I'm about to swap my brumby to SPFI.

And there's no spare parts over here :D

Cheers

Bennie

Share this post


Link to post
Share on other sites

Yeah, we are just going to have to get more creative to keep these old ones running as time goes by.

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×