XJ6 & XJ12 Series I, II & III 1968-1992
Sponsored by:
Sponsored by:

Common issues with the fuel injected 4.2?

Thread Tools
 
Search this Thread
 
  #1  
Old 12-29-2015, 07:29 AM
Hafrod's Avatar
Senior Member
Thread Starter
Join Date: Dec 2015
Location: Claremore, OKLA.
Posts: 191
Received 15 Likes on 13 Posts
Default Common issues with the fuel injected 4.2?

I've read many old posts about rough idle issues. Are there other issues this engine,trans,body,chassis can produce? Common adjustments, things to check, etc.? I'm wanting to make sure my 82 is tip top because my wife has taking a liking to it. She asked me if she could sometimes drive it to work which is a 60 mile round trip. Want her to be safe and I've always been a preventative maintenance guy.
 
  #2  
Old 12-29-2015, 08:26 AM
Jose's Avatar
Veteran Member
Join Date: Mar 2007
Location: Florida
Posts: 8,609
Received 2,429 Likes on 1,828 Posts
Default

In my experience the FI system has been nothing but reliable and dependable, with the ONLY issues being replacing the Cold Start Injector two times and replacing two maybe three fuel hoses at the fuel rail. I have replaced the Oxygen sensor once because the warning light came on, but once I learned that the light comes on every 25 thousand miles regardless, and that you just push a reset button located in the trunk, I have never replaced it again or had the need to replace it, the system requires no tune-ups. This is the Numero Uno reason I have kept the car for 25 years so far. I almost did a Doug and sold mine like he sold his pristine 1986 red XJ, a car he regrets selling, but I stopped myself and I am still having fun !
 
  #3  
Old 12-29-2015, 09:10 AM
JagCad's Avatar
Veteran Member
Join Date: Jul 2012
Location: Walnut Creek, California
Posts: 6,796
Received 2,399 Likes on 1,880 Posts
Default

In a jaguar that did not get the care afforded the care of Doug or Jose, I'd
look into the following:


1. Cooling. Water pump, belts and hoses, clear radiator, fan coupling.


2. Electrics. Starting down under with the strap from the transmission to the chassis. Then cables. Battery at both ends. Post to solenoid. Then, smaller wires. Starter relay. Coil, distributor and amplifier. Clean, tight and lubed.


3. Fuel. Tank supply and return lines secure, tight and not leaking. Injector hoses. healthy, not dried out, awaiting a split and bad things.


4. Brakes. No leaks in master, calipers and lines. Adequate pad thickness. No side pulling on application.


5. All lights function, especialy the brake lights.


Carl.
 
  #4  
Old 12-29-2015, 10:36 AM
Darrenmb's Avatar
Veteran Member
Join Date: Oct 2010
Location: Orlando Florida
Posts: 2,332
Received 1,058 Likes on 451 Posts
Default

Originally Posted by JagCad
In a jaguar that did not get the care afforded the care of Doug or Jose, I'd
look into the following:


1. Cooling. Water pump, belts and hoses, clear radiator, fan coupling.


2. Electrics. Starting down under with the strap from the transmission to the chassis. Then cables. Battery at both ends. Post to solenoid. Then, smaller wires. Starter relay. Coil, distributor and amplifier. Clean, tight and lubed.


3. Fuel. Tank supply and return lines secure, tight and not leaking. Injector hoses. healthy, not dried out, awaiting a split and bad things.

4. Brakes. No leaks in master, calipers and lines. Adequate pad thickness. No side pulling on application.


5. All lights function, especialy the brake lights.


Carl.
X2 on fuel injection hoses, replace them all! Even the ones in the trunk!
 
  #5  
Old 12-30-2015, 06:18 PM
anjum's Avatar
Senior Member
Join Date: Dec 2011
Location: London
Posts: 936
Received 192 Likes on 169 Posts
Default

Rust! Take every preventative action you can.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Perry Fisch
XJ6 & XJ12 Series I, II & III
16
01-09-2016 03:25 PM
dvsadam
S-Type / S type R Supercharged V8 ( X200 )
11
12-31-2015 08:27 AM
philwarner
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
3
12-29-2015 10:21 AM
55chevy
S-Type / S type R Supercharged V8 ( X200 )
2
12-29-2015 04:59 AM
SickRob
XK / XKR ( X150 )
4
12-24-2015 04:24 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


Quick Reply: Common issues with the fuel injected 4.2?



All times are GMT -5. The time now is 04:43 AM.