RE: [DML] An odd problem just cropped up.
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RE: [DML] An odd problem just cropped up.


I'd check your timing first of all because I've found that it can create 
problems during acceleration and during warm up if the car is not timed 
properly.  I'm a bit concerned about the Frequency valve remaining silent 
throughout your adjustments.  Try unplugging your O2 Sensor to see if it 
comes on.  It should go to a default rich setting and activate.  If that 
happens perhaps replace your O2 Sensor or trace the problem in the wiring 
back to the corresponding computer.  Did the FV use to make noise BEFORE the 
If the problems appeared AFTER your upgrades I'd go back and double check 
everything you did.

You have my number so give me a call tomorrow evening after 7:00 PM and I 
might be able to walk you through a few things.

Also go back and double check your fuel filter.  I serviced a car here with 
fuel problems and found that not only was the line at the pump leaking 
slowly over time (boot had fuel in it and I could see the line leaking) but 
the line above the fuel filter was not completely tightened.  And fuel had 
pooled up a bit on top of the Fuel Filter.  Both were leaking slowly but any 
leaks will result in crucial loss of fuel system pressure.

I have installed the Special T Auto Fuel Filter "easy connect" on a couple 
cars up here.  Now, that part is for the hard line going to the bottom of 
the filter but it allowed easier installation because I can connect the top 
line and properly torque it ALOT easier (I have to crawl around under the 
cars as I have no lift) and THEN connect the bottom with a simple hose clamp 
as I have already installed the upgraded connector on the new filter prior 
to placement.

This upgrade from STA only required a few inches of the hard line to be cut 
off.  I loved it.

Check out that connection tomorrow.

Jeff in NC

>From: "Brandon" <morpheus34711@xxxxxxxxx>
>Reply-To: dmcnews@xxxxxxxxxxxxxxx
>To: dmcnews@xxxxxxxxxxxxxxx
>Subject: [DML] An odd problem just cropped up.
>Date: Wed, 25 Jan 2006 16:21:44 -0000
>On Sunday, (the day after our Central FL meet here in Orlando) a few
>things were done on my car, #4205, including a fuel filter change and
>a complete replacement of my melted fusebox and replacing most all of
>my relays and circuit breakers, including my RPM relay.  After stage 1
>was done, (fusebox and fuel filter) the car eventually started up and
>ran  once the fuel system pressurized.  After this, we shut the car
>off again and worked on replacing the relays and breakers.  When
>finished with this, we fired up the car again and it seemed to be
>idling a little rough.  We figured the ECU needed to re-learn
>everything so we let it run.  It leveled out, but when I took it for a
>drive up to the local Sonic, it was hesitating on acceleration, almost
>like it was being starved for fuel or running lean.
>We got it back to my place and hooked up the dwell meter. (I had just
>adjusted my mixture the day before and it was good before this) I
>started the car, and the needle moved almost all the way over to the
>right then gradually crept back down to 0.  Curious, I hooked it up to
>#6720, parked right next to mine and it worked fine.  Bamboozled by
>this, I started trying to adjust the mixture my feel.  I enriched it,
>leaned it out, then slowly richened it till the idle smoothed out.
>Mind you, the frequency valve is silent through all of this.  I
>swapped out my new Lambda relay with 6720, and his car ran fine with
>both.  My main question is: What does that diag plug connection for
>the dwell meter (Top right pin when looking at it from the driver's
>side)get it's signal from?  What could have caused this issue?
>I took the car out again last night, and had the same lack of power
>issue while the car was warming up... once it did, things seemed to be
>ok power wise.  When it started up, it was sputtering a little as
>well.  Any information or ideas would be helpful at this point, since
>this issue makes absolutely no sense to me.  Thanks in advance for
>your help!
>Brandon Shelton
>VIN #4205
>Orlando, FL
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