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| Carburetor base & PCV inlet |
| Author |
Message |
    
Robert E. Hunter
New member
Username: shamrock20
Post Number: 1
Registered: 12-2007
| | Posted on Monday, December 17, 2007 - 12:21 pm: | 
|
I removed the carburetor on my 1987 PCM 302 and had the carb rebuilt. Now I have excessive crankcase pressure. Could it be that I pur the carburetor base on upsidedown to create the problem? |
Jay presti
Visitor
| | Posted on Friday, December 28, 2007 - 05:25 pm: |
|
I have a 1980 shamrock w/ pcm/ford 302 engine (heads recently rebuilt) wont idle below 17k rpm shuts off. timing the engine w/a light & want to be sure I have right info: is 6 degrees below TDC correct? |
Robert E. Hunter
New member
Username: shamrock20
Post Number: 3
Registered: 12-2007
| | Posted on Tuesday, January 01, 2008 - 04:09 pm: |
|
I think I have my crankcase pressure under control. My oil leak turned out to be a defective oil filter not excessive pressure. It took a while to find it. |
Robert E. Hunter
Member
Username: shamrock20
Post Number: 4
Registered: 12-2007
| | Posted on Tuesday, January 01, 2008 - 04:15 pm: |
|
Jaye, I think you mean 1700 rpm. I just timed my 302 and it was stalling at lower than 1200 rpm. I backed off on the timing advance. Rotate the distributor CW. When it would idle well I set it to 600 RPM and reset the timing to 8 degrees. It does fluctuate some do to the electronic ignition on the Prestolite distributor. Everything sounds good and the idle is smooth. |
Jay presti
Visitor
| | Posted on Wednesday, January 02, 2008 - 09:10 am: |
|
Mr. Hunter, first off, sorry for jumpin into your forum. I'm new to the site-didn't realize I'd be in this heading. I overheated my 20ft cc shamrock while trollin for dolphin in s. FL. I'm not a mechanic & have some one helping me w/ the overhaul, so I'm glad to have found someone who has experienced the same prob as mine. Seems like all else w/ the headgasket, exhaust manifolds, hoses etc refit went well- just can't get an idle... We'll try your suggestion- THANK YOU! -JP |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 4060
Registered: 09-2003
| | Posted on Wednesday, January 02, 2008 - 11:09 am: |
|
Sounds to me like you have a vacuum leak. Better pull the carb and eyeball the gasket. Then put a nice, new one one and tighten the bolts nice and evenly.
Jeff |
Jay presti
Visitor
| | Posted on Wednesday, January 02, 2008 - 11:53 am: |
|
Jeff, thanx for the input. The heads were magnafluxed & resurfaced as well as thorough intake manifold cleaning.(sorry to leave that out) Therefore, we also re-gasketed the Holley 4bl @ reassembly. If the timing adj doesn't give us a steady idle, the carb (& vac check) is next; don't know when it was last serviced but trying to avoid replacement @ this time. Thanx again, Jay |
jay presti
Visitor
| | Posted on Tuesday, January 29, 2008 - 12:20 pm: |
|
thanx for all the help guys- we got a nice idle from the shamy this weekend by adjusting the timing advance (slight clockwise turn did it) sounds real nice & cant wait to float her again soon- it's been months!! -JP |
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