rebuild, please help diagnose. right bank not firing

screamin gt

5 Year Member

Apr 9, 2007

393

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central CT

Jul 28, 2007

#1

• Jul 28, 2007

• #1

basically rebuilt stock 99 motor, new crank, everything stock besides heads just got valve job and polish.

anyway got it in everything is hooked up correctly as it was all labeled. fired up and right bank is not firing.

good compression, good spark, fuel injectors working. even swapped some around to the other side to be sure.

engine does idle but there is no difference when you unplug any injectector or plug wire on the right side, however there is a very noticeable difference when you unplug anything on the left side.

right side header is cool in comparison to the left.

wtf?

 

screamin gt

5 Year Member

Apr 9, 2007

393

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central CT

Jul 28, 2007

#2

• Jul 28, 2007

• #2

also, took my time with cam positioning. I realize this would be a likely culprit, but my timing marks on the chain matched the marks on the gears. also if it were even one tooth off, wouldn't that destroy the valves/pistons?

 

screamin gt

5 Year Member

Apr 9, 2007

393

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central CT

Jul 28, 2007

#3

• Jul 28, 2007

• #3

ECU? I didn't touch it, but could this be the cause?

 

trinity_gt

10 Year Member

Jan 31, 2003

3,125

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99

Canada

Jul 28, 2007

#4

• Jul 28, 2007

• #4

Silly but...any chance you forgot to install the rockers on that side?

 

C

chuck943

New Member

Oct 26, 2002

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north carolina

Jul 28, 2007

#5

• Jul 28, 2007

• #5

do a compression test first it could very well be you are a tooth off on the chains, anyway compression test will confirm this

 

screamin gt

5 Year Member

Apr 9, 2007

393

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central CT

Jul 28, 2007

#6

• Jul 28, 2007

• #6

chuck943 said:

do a compression test first it could very well be you are a tooth off on the chains, anyway compression test will confirm this

Click to expand...

compression test is high

 

screamin gt

5 Year Member

Apr 9, 2007

393

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central CT

Jul 28, 2007

#7

• Jul 28, 2007

• #7

anyone know where the timing marks on the camshaft gears are supposed to be? just took off the valve covers to check this again and they are facing opposite directions. is that right?

a friend of mine (thats a good mechanic, but doesnt work on fords) says they are supposed to be in unison with eachother.

 

C

chuck943

New Member

Oct 26, 2002

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north carolina

Jul 28, 2007

#8

• Jul 28, 2007

• #8

screamin gt said:

compression test is high

Click to expand...

is the compression equal from bank to bank or is one side higher than the other

 

Superhereaux

chicks make me feel inadequate

Founding Member

Jul 30, 2002

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South Texas

Jul 28, 2007

#9

• Jul 28, 2007

• #9

no check engine light?

 

screamin gt

5 Year Member

Apr 9, 2007

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central CT

Jul 28, 2007

#10

• Jul 28, 2007

• #10

chuck943 said:

is the compression equal from bank to bank or is one side higher than the other

Click to expand...

didn't check the side thats running good.

Superhereaux said:

no check engine light?

Click to expand...

no check engine light. checked for codes and got none, and none pending either.




I'm fairly certain that it has to be the right side cam. I'll be taking off the timing chain cover sunday. I just don't understand how it can be off though.

the gears on the crank only go on one way, so if the marks from the chain match it as well as the cam gear how can it be off? can it really be 180 degrees off and the marks still match up? guess I'll find out tommorrow...