Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 924/944/968 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
dzachry's Avatar
 
Join Date: Oct 2003
Location: Oakley Ca,
Posts: 15
Send a message via AIM to dzachry
My 84 944 has a miss!!!!

Here is one for yawl, under no load at an idle or driving at 2000 to 2400 rpm I have a miss. it goes away under a load or during de-acceleration. I was thinking that it might be Vacuum but I would think if it was vacuum it would happen at 4000 rpm as well as long as there was not load?????


What do yawl all think???
__________________
David Zachry
84 944
Old 10-03-2003, 10:08 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
gearhead290's Avatar
 
Join Date: Dec 2002
Location: South Dakota
Posts: 1,131
Send a message via AIM to gearhead290
plugs and wires would be my first guess.
__________________
95 240sx-track slut w/ too much done to list
87 944 n/a-old "toy" that broke too much
Old 10-03-2003, 10:21 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
Scott R's Avatar
 
Join Date: Feb 2001
Location: Aspen CO US
Posts: 15,186
Garage
Vacuum leak, check the J-boot on the underside for cracks.
__________________
2018 Q5 Hybrid
2005 Cayenne Turbo
2012 Panamera 4S
1980 911 SC
1999 996 Cab
Old 10-03-2003, 10:47 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered User
 
dzachry's Avatar
 
Join Date: Oct 2003
Location: Oakley Ca,
Posts: 15
Send a message via AIM to dzachry
Where is the J-Boot???
__________________
David Zachry
84 944
Old 10-03-2003, 11:59 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
Scott R's Avatar
 
Join Date: Feb 2001
Location: Aspen CO US
Posts: 15,186
Garage
Between the air flow meter and the throttle body. It's attached to the engine as well as the stationary air box. So when they get older and brittle the start to crak from engine vibration.
__________________
2018 Q5 Hybrid
2005 Cayenne Turbo
2012 Panamera 4S
1980 911 SC
1999 996 Cab
Old 10-03-2003, 12:08 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
dzachry's Avatar
 
Join Date: Oct 2003
Location: Oakley Ca,
Posts: 15
Send a message via AIM to dzachry
Oh OK Duh!!!!! LOL

I just had this Boot off and it looks good any other sugestions??
__________________
David Zachry
84 944
Old 10-03-2003, 12:39 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Registered User
 
Scott R's Avatar
 
Join Date: Feb 2001
Location: Aspen CO US
Posts: 15,186
Garage
Just to check all of your vacuum connections, and all of the "T's" for cracking and splitting. Beyond that you could have a failing injector, but thats rare on these cars.
__________________
2018 Q5 Hybrid
2005 Cayenne Turbo
2012 Panamera 4S
1980 911 SC
1999 996 Cab
Old 10-03-2003, 01:23 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
SoCal Driver's Avatar
 
Join Date: Feb 2002
Location: Costa Mesa
Posts: 8,587
Garage
Your intake maifold may be loose or warped. Mine was and gave much the same problems. Careful as you may have a pulled stud/bolt or two.
__________________
Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 10-03-2003, 03:11 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered User
 
dzachry's Avatar
 
Join Date: Oct 2003
Location: Oakley Ca,
Posts: 15
Send a message via AIM to dzachry
I will check on this in the morning. it is possible that the intake is loose because I just rebuilt the top of the motor. I will check all of the vacuum lines and the intake. is there anything that anybody would recommend to use as a fuel additive to clean the injectors??
__________________
David Zachry
84 944
Old 10-03-2003, 08:26 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Registered User
 
lousailor's Avatar
 
Join Date: Jun 2001
Location: Virginia Beach, VA
Posts: 381
Garage
Send a message via AIM to lousailor Send a message via Yahoo to lousailor
Techron seems to do the trick
__________________
Louie

'85 (Early) 944 - Beater
'87 924S - Crunch/Rebuild
'76 924 - Long Gone
"If everything seems under control, you're just not going fast enough."
- Mario Andretti
Old 10-03-2003, 08:28 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Registered User
 
bearone2's Avatar
 
Join Date: Jun 2003
Location: Phoenix, AZ
Posts: 1,327
i used chevron/techroline sul years ago to clean a lot of varnish from the injectors because of a lot of sitting and the gas went bad. it took 5-6 full tanks to clean the injectors but it worked.
One can of techron/one tank may not be enough if the gas got real funky.
__________________
87 951, K27/6, Almond Beige, 17" Turbotwist
87 944S, alpine white, 5sp died a violent death
84 944, silver/brown, auto, gone but not forgotten

"may the force be with you"
Old 10-05-2003, 05:20 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered User
 
todwic's Avatar
 
Join Date: Feb 2002
Location: 3rd plane of Hades
Posts: 2,502
Garage
Send a message via AIM to todwic Send a message via Yahoo to todwic
I would recomend a compression check
__________________
*Disclaimer: The person above is actually dumber than he appears.
my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements
'84 944 auto/ps/ac/cc
'86 951
Providing ignorance one post at a time.
Old 10-05-2003, 05:54 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
Registered User
 
dzachry's Avatar
 
Join Date: Oct 2003
Location: Oakley Ca,
Posts: 15
Send a message via AIM to dzachry
How would a difference of compression make it run bad in a curitan rpm range??
__________________
David Zachry
84 944
Old 10-05-2003, 09:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #13 (permalink)
Registered User
 
todwic's Avatar
 
Join Date: Feb 2002
Location: 3rd plane of Hades
Posts: 2,502
Garage
Send a message via AIM to todwic Send a message via Yahoo to todwic
because at higher RPM's the miss could be disguised by the harmonic vibrations of a faster revolving stuff.
__________________
*Disclaimer: The person above is actually dumber than he appears.
my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements
'84 944 auto/ps/ac/cc
'86 951
Providing ignorance one post at a time.
Old 10-05-2003, 09:25 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #14 (permalink)
Registered User
 
dzachry's Avatar
 
Join Date: Oct 2003
Location: Oakley Ca,
Posts: 15
Send a message via AIM to dzachry
OK it is fixed!!!!!!! Here is what happened. There is a set screw holding in the rotor and the shaft. The set screw for the shaft came out. This caused the rotor to travel into the top of the cap and desrtoy the cap and rotor. the miss was caused by the screw comming out and the shaft turning inside the rotor a little bit then then debris caused the spark to travel where it does not belong at that time. WHEW IS that Clear????
__________________
David Zachry
84 944
Old 10-09-2003, 12:35 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #15 (permalink)
Registered User
 
bearone2's Avatar
 
Join Date: Jun 2003
Location: Phoenix, AZ
Posts: 1,327
i feel better already.
__________________
87 951, K27/6, Almond Beige, 17" Turbotwist
87 944S, alpine white, 5sp died a violent death
84 944, silver/brown, auto, gone but not forgotten

"may the force be with you"
Old 10-09-2003, 12:43 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #16 (permalink)
Registered User
 
SoCal Driver's Avatar
 
Join Date: Feb 2002
Location: Costa Mesa
Posts: 8,587
Garage
Loose rotors and broken coil to dist wires. They get you every time!
__________________
Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 10-09-2003, 02:29 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #17 (permalink)
Registered User
 
bearone2's Avatar
 
Join Date: Jun 2003
Location: Phoenix, AZ
Posts: 1,327
if it's not the grounds.
__________________
87 951, K27/6, Almond Beige, 17" Turbotwist
87 944S, alpine white, 5sp died a violent death
84 944, silver/brown, auto, gone but not forgotten

"may the force be with you"
Old 10-09-2003, 03:06 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #18 (permalink)
 
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 01:45 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.