Weird Driving UPDATE
Thread Starter
Racer
Joined: Mar 2004
Posts: 398
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From: Aiken S.C.
Weird Driving UPDATE
Well the 84 is now driving just fine. The WIGGLE in the rear when you backed off was (2) missing washers on on each side of the shock where it mounted on the bottom.
Now I have an engine "SHUDDER" like a cylinder dropping out or just DEAD.
We tested the plugs and plug wire and also tested the spark strength (see if it was firing) It is isolated to #3 on the drivers side. Will pull and test the injection.
NEW plugs, wires, cap , rotor etc. So THINKING it is fuel problems. Will do a compression test BEFORE we blame the injection.
Now I have an engine "SHUDDER" like a cylinder dropping out or just DEAD.
We tested the plugs and plug wire and also tested the spark strength (see if it was firing) It is isolated to #3 on the drivers side. Will pull and test the injection.
NEW plugs, wires, cap , rotor etc. So THINKING it is fuel problems. Will do a compression test BEFORE we blame the injection.
Thread Starter
Racer
Joined: Mar 2004
Posts: 398
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From: Aiken S.C.
Never hurts to check that 1% since it is the most LOGICAL answer.
Race Director
Joined: Sep 2007
Posts: 12,162
Likes: 383
From: Johnson City, TN
I think you just pulled these for fuel line stubs? Easy enough to pull again to replace the injector. Might not even need new intake gasket. I would run a compression check, at least on that cylinder, and check the plug.
Thread Starter
Racer
Joined: Mar 2004
Posts: 398
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From: Aiken S.C.
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Thread Starter
Racer
Joined: Mar 2004
Posts: 398
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From: Aiken S.C.
Plug will get checked after I run it in the morning back over to the shop.
The ORGINAL plug that cam out was NOT:
Oil fouled OR gas fouled, just looked like it was doing NOTHING. Other 7 wher a nice light grey.
We have a proximty tester for spark and it showed a good spark so I am thing fueling problem more and more.
Will run teh compression test also. Can also do the old, unplug the coil pull the injector and just spin it over to see if it putting any fuel out.
Team Owner
Joined: May 2004
Posts: 31,333
Likes: 4,289
From: Philly PA
Here is a link to the firing order for a S4 and the layout of the cylinder numbering. this will put you on the same page as everyone else
https://rennlist.com/forums/928-foru...t=firing+order
https://rennlist.com/forums/928-foru...t=firing+order
Thread Starter
Racer
Joined: Mar 2004
Posts: 398
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From: Aiken S.C.
Here is a link to the firing order for a S4 and the layout of the cylinder numbering. this will put you on the same page as everyone else
https://rennlist.com/forums/928-foru...t=firing+order
https://rennlist.com/forums/928-foru...t=firing+order
Car in question is a 1984 Single ignition car.
WOW thought someone STOLE a distributor!!
Team Owner
Joined: May 2004
Posts: 31,333
Likes: 4,289
From: Philly PA
It is isolated to #3 on the drivers side. Will pull and test the injection.
NEW plugs, wires, cap , rotor etc.
George, The reason I added the link was so you would see how the cylinders are numbered as the #3 in the driver side is actually #7.
The S4 wire layout doesnt apply in your case as you have a single distributor on the driver side cam housing
Only the 32Valve engines have the dual distributor caps, one on the front of each head.
And the early LH cars 84-85 Euro 16V have a twin dizzy on the driver side cam housing.
Glad you got the suspension figured out, I hope that you find the shudder iisue
NEW plugs, wires, cap , rotor etc.
George, The reason I added the link was so you would see how the cylinders are numbered as the #3 in the driver side is actually #7.
The S4 wire layout doesnt apply in your case as you have a single distributor on the driver side cam housing
Only the 32Valve engines have the dual distributor caps, one on the front of each head.
And the early LH cars 84-85 Euro 16V have a twin dizzy on the driver side cam housing.
Glad you got the suspension figured out, I hope that you find the shudder iisue
Thread Starter
Racer
Joined: Mar 2004
Posts: 398
Likes: 0
From: Aiken S.C.
It is isolated to #3 on the drivers side. Will pull and test the injection.
NEW plugs, wires, cap , rotor etc.
George, The reason I added the link was so you would see how the cylinders are numbered as the #3 in the driver side is actually #7.
The S4 wire layout doesnt apply in your case as you have a single distributor on the driver side cam housing
Only the 32Valve engines have the dual distributor caps, one on the front of each head.
And the early LH cars 84-85 Euro 16V have a twin dizzy on the driver side cam housing.
Glad you got the suspension figured out, I hope that you find the shudder iisue
NEW plugs, wires, cap , rotor etc.
George, The reason I added the link was so you would see how the cylinders are numbered as the #3 in the driver side is actually #7.
The S4 wire layout doesnt apply in your case as you have a single distributor on the driver side cam housing
Only the 32Valve engines have the dual distributor caps, one on the front of each head.
And the early LH cars 84-85 Euro 16V have a twin dizzy on the driver side cam housing.
Glad you got the suspension figured out, I hope that you find the shudder iisue
Well problem was the MAF unit was bad, took the one from the parts car and smooth as silk. The plug had fire and the injection was fine.
NOW there is a Vibration under load. If this was my Mercedes I would go after the center bearing on the drive shaft support as the source.
Will get back to the 928 AFTER we load the race car for Daytona. Changed the oil, plugs and a little look over of the car. Still need to do a torque trip around the car.
