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Author
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Topic: Distributor wont hold timing
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East Bay 50
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Member # 8081
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posted
 
 
So after multiple attempts with changing distributors. My car keeps retarding. Once its set it will be good for a few weeks but then it does the same thing again. Has anyone ever had this problem? This is on a 91 mustang with a 347 if it matters
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Kurgan tuned stroked and blown 347 foxbody. boost nukka!
Posts: 2699 | Registered: Dec 2007
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OneFastHatch.
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Member # 9537
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posted
Timing chain?
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1991 fobra (slow)
Posts: 2139 | From: bay area | Registered: Oct 2009
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norcalfiddy
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Member # 11207
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posted
Is it moving?
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600HP 1996 7.3L powerstroke single cab short bed race truck
Posts: 3393 | From: Brentwood | Registered: Aug 2011
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coupedup
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Member # 9987
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posted
sounds like a bad distributor gear
Posts: 4406 | From: Ca | Registered: May 2010
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East Bay 50
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Member # 8081
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posted
Dizzy gear is new. Timing chain is new too.
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Kurgan tuned stroked and blown 347 foxbody. boost nukka!
Posts: 2699 | Registered: Dec 2007
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Greasy
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Member # 5258
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posted
Happened to a buddy of mine, the bolt that holds the timing gear onto the cam was loose.
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'93 Cobra-Coyote Powered
'03 DSG Cobra
'13 Dodge Cummins
'14 Rubicon X
Posts: 3272 | From: North Dallas | Registered: Jan 2005
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BIGBALLFACTOR
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Member # 7277
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posted
Have someone that know what there doing to work on it there's lots of thens that can make happen
[ December 29, 2012, 05:59 PM: Message edited by: FASTHATCH 925 ]
Posts: 6908 | From: okc | Registered: Dec 2006
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Ricks Hot Rod Lincoln
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Member # 7637
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posted
I have three possible answers:
I have the same issue on my 1990 Lincoln Mark VII (It is a Fox Chassis) that I converted to Mass-Air when I put in my 342 (It's a standard bore stroker) I have the C3W1 ECU Ford : F3ZF-12A650-FB that is a Ford replacement ECU and used in the 1993 Mustangs. When I had a chip burned for my car tech said for has some ECU's that mess with the timing and causes the timing to change.
My second suggestion is: Is the outer ring on the harmonic balancer slipping? If you haven't checked this. Here is the way to do it.
Pull the #1 spark-plug out, insert a wooden dowel and hand crank the engine to top dead center and When the dowel stops moving, make a mark on the balancer. Continue to rotate the crank by hand and when the dowel starts moving down, mark the balancer again. TDC should be in the middle of those two marks, or very close. if it isn't, your ring might be slipping and giving you a false reading.
Lastly, did you relocate your air charge temp sensor from the intake manifold to the cold air intake to send the ECU a false reading? I wonder if this is my issue to. This is just a theory...
LMK if any of these help, Rick
Plan D: do you have a boost retard unit that pulls timing as your boost rises? MAP/BAR sensor bad?
[ December 29, 2012, 11:36 PM: Message edited by: Ricks Hot Rod Lincoln ]
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Son, Ya gonna drive me to drinkin if ya don't stop driving that Hot--Rod--Lincoln.
Posts: 46 | From: Sacramento, CA | Registered: May 2007
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Ricks Hot Rod Lincoln
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Member # 7637
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posted
Crap, now I thought of another...
Did you install a aftermarket oil pump drive that is heavy duty like what ARP sells? You do know you need to trim off about an 1/8-3/16" off the bottom of the dizzy shaft so you don't force the drive down into the pump. and as the engine runs, the dizzy is able to drop down further into the engine changing your timing. I learned this lesson the hard and EXPENSIVE way...
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Son, Ya gonna drive me to drinkin if ya don't stop driving that Hot--Rod--Lincoln.
Posts: 46 | From: Sacramento, CA | Registered: May 2007
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East Bay 50
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Member # 8081
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posted
I just reset it to 10 btdc to get it to run corretly again. But hotrod ric suggested some interesting possibilities. Thanks guys. Ill let you guys know what i find
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Kurgan tuned stroked and blown 347 foxbody. boost nukka!
Posts: 2699 | Registered: Dec 2007
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turbo50
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Member # 6700
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posted
Is ur check engine light still fuctioning?
[ December 30, 2012, 10:37 AM: Message edited by: turbo50 ]
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.........when was the last time YOU built something with YOUR own hands?
I offer quality sidework at reasonable prices. PM ME
Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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East Bay 50
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Member # 8081
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posted
quote:
Originally posted by turbo50:
Is ur check engine light still fuctioning?
The cel has not worked in 20 years lol
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Kurgan tuned stroked and blown 347 foxbody. boost nukka!
Posts: 2699 | Registered: Dec 2007
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turbo50
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Member # 6700
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posted
quote:
Originally posted by East Bay 50:
quote:
Originally posted by turbo50:
Is ur check engine light still fuctioning?
The cel has not worked in 20 years lol
Hahhahaha
well let us know what you find when you fix it.
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.........when was the last time YOU built something with YOUR own hands?
I offer quality sidework at reasonable prices. PM ME
Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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Ricks Hot Rod Lincoln
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Member # 7637
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posted
After reading Turbo 50's link he included, maybe your Air charge sensor in the #5 runner is intermittently bad? Less that $15 at O'Reily's.
It was my third theory in my first post. And it does retard spark...
http://eectuning.org/forums/viewtopic.php?t=4245
[ December 31, 2012, 04:01 AM: Message edited by: Ricks Hot Rod Lincoln ]
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Son, Ya gonna drive me to drinkin if ya don't stop driving that Hot--Rod--Lincoln.
Posts: 46 | From: Sacramento, CA | Registered: May 2007
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89Rodknocker
CAFords OG
Member # 2951
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posted
Its probally not the case but ive seen the oil pump starting to lockup causing the dist to move untill it eventually turns the oil pump rod into a curly fry then snap.
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89 lx (stolen and stripped)
94 gt runner (sold)
89 lx Stock(sold)
86 gt T-trim (sold)
73 Camaro BBC
01 5.0 Explorer limited Borlas (sold)
Posts: 2488 | From: Bay Area | Registered: Jun 2003
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4IDFOX
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Member # 9921
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posted
Two questions.
Do you have a hv oil pump ?
Is the dist. hold down clamp chrome ?
Posts: 375 | From: Redding CA | Registered: Apr 2010
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SLOWSN95
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Member # 8269
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posted
Do you have a stock cam?
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94' GT
347 Stroker
MM Suspended
2003 SB SVT Lightning
Pullied and Lowered
89'Hatch-SOLD
Posts: 2214 | From: 510/east bay | Registered: Mar 2008
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turbo50
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Member # 6700
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posted
I'm sure it is mechanical and either dizzy gear, cam gear, or oil pump related.....but it hasn't died yet lol
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.........when was the last time YOU built something with YOUR own hands?
I offer quality sidework at reasonable prices. PM ME
Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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JohnB
Tech Moderator
Member # 969
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posted
What is the condition of the distributor gear?
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6525 | From: Orlando FL/Redding CA | Registered: Mar 2002
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Sikwidit-blumaxx88
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Member # 11046
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posted
quote:
Originally posted by Ricks Hot Rod Lincoln:
Crap, now I thought of another...
Did you install a aftermarket oil pump drive that is heavy duty like what ARP sells? You do know you need to trim off about an 1/8-3/16" off the bottom of the dizzy shaft so you don't force the drive down into the pump. and as the engine runs, the dizzy is able to drop down further into the engine changing your timing. I learned this lesson the hard and EXPENSIVE way...
How true is this I just installed a new oil pump and I'm haveing a similar issue????
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SikwidiT cc
1988 5.0
Posts: 507 | From: East bay | Registered: Jun 2011
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