CaliforniaSpecial.com -- Message Boards -- 1968 California Special Limited Edition Ford Mustang GT/CS
D I S C U S S I O N . F O R U M
COMMUNITY
1968 GT/CS & HCS
2007+ GT/CS
1966-1967 HCS

Vote!

Old 07/12/2008, 06:25 PM   #1
case12
 
case12's Avatar
 
'66 Convert., '00 GT Convert., '36 Ford, '07 Shelby GT-H Convt.

Location: Crystal Lake, IL
Joined: Oct 04
eBay: case12
Posts: 1,450

347 Stroker Making Chirping Noise - Fuel Pump Eccentric

My 347 has developed a chirping noise. It is not any of the belts or accessories as we went through the process of elimination with these. The mechanic is saying that it is fuel pump eccentric. He determined this by taking out the mechanical fuel pump, and adding an electric pump and the noise went away. He put the mechanical pump back on and it came back (they tried to lube the arm, but it didnt help). I searched the web but found nothing like this.

The noise is a "chirp" and comes and goes, but is very loud and obnoxious. Has anyone heard of this, and what is the repair? Ideas?

Casey

1968 GT/CS on cover and featured article, "Gold Rush", in Mustang Times, February 2006
1966 Convertible featured article, "Sweet '66' ", in Mustang Times, January 2008
case12 is offline   Reply With Quote
Old 07/12/2008, 06:49 PM   #2
franklinair
My Car Details
 
franklinair's Avatar
 

Location: Franklin, NC
Joined: Mar 07
Posts: 3,848

My Garage
The eccentric gets splashed with oil/lubricant. Try a new fuel pump.

Neil
franklinair is offline   Reply With Quote
Old 07/12/2008, 07:17 PM   #3
case12
 
case12's Avatar
 
'66 Convert., '00 GT Convert., '36 Ford, '07 Shelby GT-H Convt.

Location: Crystal Lake, IL
Joined: Oct 04
eBay: case12
Posts: 1,450

Trying another fuel pump seems like a good idea. I will do that. But I also wonder why the mechanic feels the eccentric needs to be replaced - not getting splashed with oil? I think I will call the people that hand built the engine on Monday too....Casey

- (this started after I got about 100 miles on the engine)

1968 GT/CS on cover and featured article, "Gold Rush", in Mustang Times, February 2006
1966 Convertible featured article, "Sweet '66' ", in Mustang Times, January 2008
case12 is offline   Reply With Quote
Old 07/12/2008, 08:01 PM   #4
davidathans
My Car Details
 
davidathans's Avatar
 
Best e.t. : 11.042, Fastest speed: 124.08, Best 60' : 1.615, 0 to 100 in 6.98

Location: San Fernando Valley, California
Joined: Jul 04
Posts: 703

Im running a mechanical fuel pump made by holley that i believe is 130gph. if you eliminate the mechanical fuel pump and go with only an electric one...it will increase your performance, but if the pump goes bad, you are stuck. i run a combination of the two on my car. i only need the inline electric fuel pump (holley red 7psi 110gph) located right where the gas tank is, when i am drag racing. Good luck casey
davidathans is offline   Reply With Quote
Old 07/12/2008, 09:44 PM   #5
franklinair
My Car Details
 
franklinair's Avatar
 

Location: Franklin, NC
Joined: Mar 07
Posts: 3,848

My Garage
I think what you're actually hearing is the diaphragm IN the fuel pump (chirp-chirp-chirp).

Neil
franklinair is offline   Reply With Quote
Old 07/15/2008, 08:45 PM   #6
@Holmes
My Car Details
 
@Holmes's Avatar
 

Location: McAllen, Texas
Joined: Dec 06
eBay: SMUMANIAC
Posts: 238

2nd that - btw those button top fule pumps are getting pricy

I profess to know nothing and only wish to associate with those who do!
@Holmes is offline   Reply With Quote
Old 07/16/2008, 08:36 AM   #7
rvrtrash
 
rvrtrash's Avatar
 
So many cars, so little time!

Location: Post Falls, Id.
Joined: Apr 03
Posts: 3,437

My Garage
I'd try a new fuel pump also. It's a lot cheaper and easier than replacing the eccentric, which requires taking everything off the front of the engine.

Steve

The wannabe formerly known as an owner.
rvrtrash is offline   Reply With Quote
Old 07/16/2008, 10:11 AM   #8
case12
 
case12's Avatar
 
'66 Convert., '00 GT Convert., '36 Ford, '07 Shelby GT-H Convt.

Location: Crystal Lake, IL
Joined: Oct 04
eBay: case12
Posts: 1,450

I ordered one. The original replacement ones were only $45. I will let everyone know when it arrives and if it fixes the problem. I havent replaced a fuel pump before, but I assume it is just draining some gas from two hoses and then just two bolts to change it out - it seems straight forward. Casey

1968 GT/CS on cover and featured article, "Gold Rush", in Mustang Times, February 2006
1966 Convertible featured article, "Sweet '66' ", in Mustang Times, January 2008
case12 is offline   Reply With Quote
Old 07/16/2008, 10:34 AM   #9
franklinair
My Car Details
 
franklinair's Avatar
 

Location: Franklin, NC
Joined: Mar 07
Posts: 3,848

My Garage
Piece of cake. Two fuel lines (guzinta & guzouta). When inserting the new fuel pump, be sure the arm goes UNDER the eccentric on the timing gear.

Neil
franklinair is offline   Reply With Quote
Old 07/17/2008, 05:55 PM   #10
case12
 
case12's Avatar
 
'66 Convert., '00 GT Convert., '36 Ford, '07 Shelby GT-H Convt.

Location: Crystal Lake, IL
Joined: Oct 04
eBay: case12
Posts: 1,450

OK - I finally got the new pump installed. It turned out not to be a piece of cake 'cause I had to learn the hard way to install your hard line fitting BEFORE putting the pump on - I spent an hour trying to align the fitting before a friend told me what to do.

SO - it unfortunately did not make the noise go away, so we can now also rule out the pump. I guess my mechanic may have it right with the eccentric. Its covered under the engine warranty, so I guess we head that direction now.

It is a real loud (embarising) chirp, so it makes the car not so much fun to drive until we get it fixed. I am up for any other ideas before we start tearing the front of the engine off.

Casey

1968 GT/CS on cover and featured article, "Gold Rush", in Mustang Times, February 2006
1966 Convertible featured article, "Sweet '66' ", in Mustang Times, January 2008
case12 is offline   Reply With Quote
Old 07/17/2008, 09:29 PM   #11
HappyHour
 
HappyHour's Avatar
 

Location: Bay Area\ SoCal
Joined: Jul 07
Posts: 495

Hope you pinpoint the cause Casey. Maybe you can tell them you were dragging a Mopar RoadRunner and your 347 CS "ate that thing for lunch"?

Robert
68 J Code SoCal Special
94 Defender 90 #16 "Best 4x4xfar"
HappyHour is offline   Reply With Quote
Old 07/18/2008, 09:12 AM   #12
davidathans
My Car Details
 
davidathans's Avatar
 
Best e.t. : 11.042, Fastest speed: 124.08, Best 60' : 1.615, 0 to 100 in 6.98

Location: San Fernando Valley, California
Joined: Jul 04
Posts: 703

sorry to hear about that casey. hopefully it will get fixed under warranty
davidathans is offline   Reply With Quote
Old 07/26/2008, 03:42 PM   #13
robert campbell
My Car Details
 

Location: Bremerton Washington
Joined: Apr 07
Posts: 3,646

My Garage
Casey,
Have the guy who built the engine also check to see if the "oil slinger" is in front of the lower timing gear. It is a thin stamp steel round slinger that throws oil up on the chain and ecentric. May want to take a close look at the chain and gears while it is apart if they did not install the slinger.

Rob
robert campbell is offline   Reply With Quote
Old 07/26/2008, 07:26 PM   #14
rvrtrash
 
rvrtrash's Avatar
 
So many cars, so little time!

Location: Post Falls, Id.
Joined: Apr 03
Posts: 3,437

My Garage
Quote:
Originally Posted by robert campbell View Post
Casey,
Have the guy who built the engine also check to see if the "oil slinger" is in front of the lower timing gear. It is a thin stamp steel round slinger that throws oil up on the chain and ecentric. May want to take a close look at the chain and gears while it is apart if they did not install the slinger.

Rob
I posted about the slinger and then deleted after re-reading the symptoms. If the engine was built with a double roller chain and gears, sometimes the slinger won't fit and rubs on the inside of the timing cover. I had to leave mine off.

Steve

The wannabe formerly known as an owner.
rvrtrash is offline   Reply With Quote
Old 07/26/2008, 07:35 PM   #15
case12
 
case12's Avatar
 
'66 Convert., '00 GT Convert., '36 Ford, '07 Shelby GT-H Convt.

Location: Crystal Lake, IL
Joined: Oct 04
eBay: case12
Posts: 1,450

Probably take it apart 2nd week of August. I am trying to drive it as much as possilbe to flesh out any other issues. None so far - the engine is very strong and we gave it really good workout a couple days ago - everything from burn-outs to running it up to about 90mph. I sure wish the engine loud chirping sound wasnt there, because everything else is strong (I may have to adjust the timing or fuel mix a bit - it idles a bit rough). It is just a real annoying loud chirp. I put my stethescope on it and it seems to be coming from the timing cover right aroudn the fuel pump/cam area. It starts up after the car runs for about a minute, and then gets louder and softer while driving. I really cant get a good pattern of when/why other than that. I am so happy with the engine, I really hate to stir up any other problems by taking the front off, but it looks like that is what we have to do. Thanks, Casey

1968 GT/CS on cover and featured article, "Gold Rush", in Mustang Times, February 2006
1966 Convertible featured article, "Sweet '66' ", in Mustang Times, January 2008
case12 is offline   Reply With Quote
Reply

  CaliforniaSpecial.com Forums > GT/CS and HCS Forums > GT/CS and HCS Discussions

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
fuel pump replacement on 390 deestix GT/CS and HCS Discussions 2 10/03/2003 07:26 PM


All times are GMT -7. The time now is 12:08 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2017, vBulletin Solutions Inc.


This site created, owned and maintained by Jon Hanna - Copyright 1996-2011
All rights reserved. CaliforniaSpecial.com is not affiliated with Ford Motor Company

ShowCase vBulletin Plugins by Drive Thru Online, Inc.