Car dies apon startup after heads cam.

5.0TailPipeHump

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Dec 5, 2006

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May 20, 2009

#1

• May 20, 2009

• #1

Just finished up a heads cam install' the cam is the n21 afm cam and seems pretty mild but the car is having idleing issues ' in order to start up the car you have got to keep the gas pedel to the floor then it will start but you also have to keep it at around 3000 rpms for a minute and it will level off on the idle' i have low compression in 1 cylinder ' what would cause this ' any suggestions would be awsome as i need this beast on the road.

Heres the cam specs. http://i43.tinypic.com/24awyew.jpg

 

Strype

Cuthbert catcher

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Huntsvegas, AL

May 20, 2009

#2

• May 20, 2009

• #2

Stuck valve or leaking injector... Just a thought

 

jrichker

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May 20, 2009

#3

• May 20, 2009

• #3

Engine that has had the heads off or valves adjusted - do a compression test to make sure the valves are not adjusted too tight. You should have a minimum of 90 PSI on a cold engine.

 

5.0TailPipeHump

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May 20, 2009

#4

• May 20, 2009

• #4

Right on guys ' any more suggestions please as im going to be looking into this on the weekend.

 

C

cheese_05_70

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Aug 29, 2005

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May 20, 2009

#5

• May 20, 2009

• #5

What kind of rockers? stock, pedestal or stud you might have one ajusted to tight and hanging the vavle open thats where I would start

 

5.0TailPipeHump

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May 21, 2009

#6

• May 21, 2009

• #6

The rockers are crane cam 1.7 rr .

Would a weak cylinder cause a hard start ' when it warms up it will idle fine' iv just gotta keep on the gas for abit when starting.

 

C

cheese_05_70

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Aug 29, 2005

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May 21, 2009

#7

• May 21, 2009

• #7

How did you adjust them there is a specific procedure you have to follow or it will hang a valve open.
I have done this and it was missing really bad at idle then you give it gas and it would go away.

Do you know if they are pedestal or stud mount?

 

5.0TailPipeHump

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May 22, 2009

#8

• May 22, 2009

• #8

Update ' ok im smelling gas in the oil' this cant be good and something is not firing proper.

 

90lxcoupe

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May 22, 2009

#9

• May 22, 2009

• #9

dont take this the wrong way, but did you check the firing order?

ive screwed this up before and its really simple but easy to screw up

 

5.0TailPipeHump

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May 22, 2009

#10

• May 22, 2009

• #10

90lxcoupe said:

dont take this the wrong way, but did you check the firing order?

ive screwed this up before and its really simple but easy to screw up

Click to expand...

Will double check firing order . Iv got the idle set up just past 1000rpms and am going to change out oil tomorrow .