Fordmods Logo

EA MPFI Injector Ports Look Partially Blocked 

 

Page 1 of 1 [ 8 posts ] 

 
 Post subject: EA MPFI Injector Ports Look Partially Blocked
Posted: Mon Apr 16, 2012 8:58 pm 
Parts Gopher
Offline
User avatar

Age: 47

Posts: 92

Joined: 8th Apr 2012

Ride: EA Falcon S 30th Anniversary

Location: Brisbane
QLD, Australia

I am unsure of the history of my EA 3.9 MPFI but in trying to sort out a heap of running issues I went to fit new injectors tonight. When I removed the old ones I checked the injector ports visually and found the No.3 port half blocked off on the upper side. I poked the blockage and it is very hard and if I'm right it is actually cylinder head material? The No.6 port is even worse although being dirty and hard to see I'm not sure.

I looked up online and found a tech bulleting talking about MPFI engines fitted with CFI intake gaskets but that suggests all ports would be partially blocked off due to the non-injector gasket. Which makes me wonder if someone has maybe fitted a CFI head or something in the past? (it has the original engine number though).

Strangely the car has had bad vibes when accelerating above say 2000rpm and this may suggest why.

Anyone advise if this is a head thing and why cylinder 3 and 6 might be this way?

 

_________________

1991 EA2 Ford Falcon S Sedan
LeMans Red - 30th Anniversary 3.9 MPFI Manual LSD

1996 XH Ford Falcon Outback Ute
LeMans Red 4.0 Auto

Originality saves our history.

Top
 Profile  
 
 
 Post subject: Re: EA MPFI Injector Ports Look Partially Blocked
Posted: Mon Apr 16, 2012 11:58 pm 
Parts Gopher
Offline
User avatar

Age: 47

Posts: 92

Joined: 8th Apr 2012

Ride: EA Falcon S 30th Anniversary

Location: Brisbane
QLD, Australia

No replies or ideas so I ripped off the intake manifold and have to say good old Geelong casting plant have excelled themselves on this one :shock: :x How this car got to 290,000km with this is beyond me.

After taking the manifold off I found the No.1 and No.6 ports partially blocked by the intake gasket. The gasket had shrunk in the section between ports/runners and in doing so pulled the gasket through ripping the bolt holes. No.6 was so far across it was blocking off the injector. Put this down to old age of 21 years on and off the road plus 290,000km which ain't bad for an original engine and head given what used to go wrong with EA head bolts and all that.

But the cake goes to No.3 where I found the head casting was defective. What I found was that the injector port was mostly non-existent, so the injector has been firing into a preverbial brick wall all these years. I got the round file and half round needle file out and made it right. Will post a pic when I get the camera charged up and work out how.

I am suspecting after this the old girl will gain a few herbies under the bonnet! :P

 

_________________

1991 EA2 Ford Falcon S Sedan
LeMans Red - 30th Anniversary 3.9 MPFI Manual LSD

1996 XH Ford Falcon Outback Ute
LeMans Red 4.0 Auto

Originality saves our history.

Top
 Profile  
 
 
 Post subject: Re: EA MPFI Injector Ports Look Partially Blocked
Posted: Tue Apr 17, 2012 12:05 am 
Getting Side Ways
Offline
User avatar

Age: 31

Posts: 623

Joined: 24th May 2007

Gallery: 9 images

Ride: 97 TICKFORD XR6 Manaul

Location: Aldinga Beach
SA, Australia

yeah be keen to see a pic of before and after
never heard of this before........
Top
 Profile  
 
 
 Post subject: Re: EA MPFI Injector Ports Look Partially Blocked
Posted: Thu Aug 02, 2012 9:15 pm 
Parts Gopher
Offline
User avatar

Age: 47

Posts: 92

Joined: 8th Apr 2012

Ride: EA Falcon S 30th Anniversary

Location: Brisbane
QLD, Australia

Just trying to attach the picture finally. Closest in view is a correctly finished port, second back is the casting showing how teh injector has been fiting into a wall for 290,000km!!!

 

 

Attachments:
File comment: Picture of badly cast injection port.
DSC02911_35%.jpg
DSC02911_35%.jpg [ 301.12 KiB | Viewed 61 times ]

 

_________________

1991 EA2 Ford Falcon S Sedan
LeMans Red - 30th Anniversary 3.9 MPFI Manual LSD

1996 XH Ford Falcon Outback Ute
LeMans Red 4.0 Auto

Originality saves our history.

Top
 Profile  
 
 
 Post subject: Re: EA MPFI Injector Ports Look Partially Blocked
Posted: Thu Aug 02, 2012 10:18 pm 
Getting Side Ways
Offline

Age: 66

Posts: 2548

Joined: 18th Mar 2006

Ride: EF-XR8chaser

Location: wollongong
NSW, Australia

Aussie Pete wrote:
Just trying to attach the picture finally. Closest in view is a correctly finished port, second back is the casting showing how teh injector has been fiting into a wall for 290,000km!!!

xf was the same,check the head and intake to the new gasket,you will be :shock: :shock:

 

_________________

R.I.P HANS HARTMAN

Top
 Profile  
 
 
 Post subject: Re: EA MPFI Injector Ports Look Partially Blocked
Posted: Fri Aug 03, 2012 1:35 am 
Getting Side Ways
Offline
User avatar

Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

I use hi-temp grease on the intake gasket, helps to keep them softer for longer, and not to shrink too much......need to check the bolts every so often too.

 

_________________

http://youtu.be/jJTh9F3Vgg0

Top
 Profile  
 
 
 Post subject: Re: EA MPFI Injector Ports Look Partially Blocked
Posted: Fri Aug 03, 2012 11:22 am 
Parts Gopher
Offline
User avatar

Age: 47

Posts: 92

Joined: 8th Apr 2012

Ride: EA Falcon S 30th Anniversary

Location: Brisbane
QLD, Australia

Obviously the gasket is one thing, but casting the head like that and not noticing it during engine build is really poor form.

 

_________________

1991 EA2 Ford Falcon S Sedan
LeMans Red - 30th Anniversary 3.9 MPFI Manual LSD

1996 XH Ford Falcon Outback Ute
LeMans Red 4.0 Auto

Originality saves our history.

Top
 Profile  
 
 
 Post subject: Re: EA MPFI Injector Ports Look Partially Blocked
Posted: Fri Aug 03, 2012 2:10 pm 
Getting Side Ways
Offline

Age: 27

Posts: 1114

Joined: 18th Oct 2006

Location: Adelaide
SA, Australia

hmm as if it even ran at all , mine with a slight fuel pressure problem / injector clogged slightly wont even run right at all

your very lucky
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 8 posts ] 

Who is online

Users browsing this forum: No registered users and 25 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Mon Dec 11, 2017 1:44 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names