Sign in to follow this  
scout01

What Did You Do To Your Car Today.

Recommended Posts

Replaced the fuel pressure regulator trying to track down a problem.  That didn't fix it.  :(

 

Share this post


Link to post
Share on other sites

 

19 hours ago, Zappo said:

Replaced the fuel pressure regulator trying to track down a problem.  That didn't fix it.  :(

 

What's going on?

Share this post


Link to post
Share on other sites

When I start it cold, it sometimes acts like it is only firing on 3 cylinders, then slowly comes up to idle normally.  Not every time, but half the time.  AFR shows normal, it just doesn't run right the first 20 seconds or so.

Also, if it isn't warmed up, give it a little gas to start out and it wants to stall.  Once is starts to warm up, these problems go away.  The other issue is under boost it acts like it hits rev limiter at 4200-4500 RPM.  No boost you can get it to 5000.  Fuel economy sucks as well.  AFR under boost should be 11.3-11.5, but it is 12.1.  The tune wasn't set that lean.

Not a MAF or O2 sensor issue, ignition system is all new, even the coil.

Share this post


Link to post
Share on other sites

George, I can’t remember, what injectors are you running? 

Share this post


Link to post
Share on other sites

Pressure was tested at the rail at idle and it was normal.   However, that testing was done a month ago and things have gotten worse since then.

Injectors are Bosch 630cc.

Share this post


Link to post
Share on other sites

fuel pump? Had the same problem in my s70 na minus the AFR issues (obviously). Replaced fuel pump and all is well. I think I let the gas tank run too low too many times and it just slowly started to give out. I had that rough shitty idle at random start up (many times if I didn't drive it all weekend), but it would resolve itself, and sometimes wouldn't happen for weeks. Car started to completely cut off recently so I replaced the pump and that fixed it. 

Share this post


Link to post
Share on other sites

Well, the pump is next on my list.   It is a Walbro that I installed many years ago.

Share this post


Link to post
Share on other sites

Tint. Already got hid's. Now to find an R bumper. 

Also need to get the OBX tip shortened. 

Still digging this car. Got it for 1k and just been putting old parts on it. :cool:

7B0c0z1.jpg

A while back I plasti-dipped the bumper grilles and put junk yard fogs in it.
Before someone had painted the grilles and fogs white. 
lc_shrug-400x225.gif

ysjSeVb.jpg

 

 

Share this post


Link to post
Share on other sites

Installed a brand new Walbro fuel pump last night.  Didn't fix my issue.   :(

 

Share this post


Link to post
Share on other sites

No, but I have a new fuel pump relay I can swap in before going to work.  I will have to order the ignition relay.

 

 

Share this post


Link to post
Share on other sites

Fuel pump relay didn't change anything.  I doubt ignition relay will either.

Share this post


Link to post
Share on other sites

crush it? 

jkjkjkjkjk

How long has this been happening?

 

Share this post


Link to post
Share on other sites
On 8/24/2018 at 6:03 PM, CAAnglin said:

Tint. Already got hid's. Now to find an R bumper. 

Also need to get the OBX tip shortened. 

Still digging this car. Got it for 1k and just been putting old parts on it. :cool:

7B0c0z1.jpg

A while back I plasti-dipped the bumper grilles and put junk yard fogs in it.
Before someone had painted the grilles and fogs white. 
lc_shrug-400x225.gif

ysjSeVb.jpg

 

 

Now I want a white S70... it looks awesome!

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this