Birty Dastards Jeep Club

Please login or register.

Login with username, password and session length
Advanced search  
Pages: [1]   Go Down

Author Topic: 4ltr cherokee slow starting  (Read 1670 times)

0 Members and 1 Guest are viewing this topic.

Dave69

  • Club Member
  • Forum Member
  • *
  • Guru: 15
  • Offline Offline
  • Posts: 9457
  • Vehicle: CJ-7 4.2 auto
  • Year: 1979
4ltr cherokee slow starting
« on: November 06, 2009, 03:38:38 PM »

any pointers on this potential problem ?

the mk1 cherokee runs fine but the starting is getting irregular.

normally the ignition is turned to on and the following lights are illuminated, seatbelt and check engine, the fuel pump is heard to be running and then the engine then starts.

but now the seatbelt light is illuminated and there is now a variable long delay before the check engine light is illuminated and the fuel pump is heard. what does the ECU check prior to sending the voltage to the fuel pump ?

there is no ABS or air con so these relays and fuses have been removed and the system was working fine without these. I was thinking about replacing the CPS as a matter of course but any other ideas would be helpful (anywhere cheaper than £82 from mansfield)
Logged
XJ 2.5 diesel - dead. XJ 4.0 6" lift - sold to some lucky person
CJ7 4.2 auto standard(ish)
Alfa 147 jtdm

Mike Pavelin

  • Guest
Re: 4ltr cherokee slow starting
« Reply #1 on: November 06, 2009, 04:00:22 PM »

Last time I came across that one it was the PCM.
Logged

Dave69

  • Club Member
  • Forum Member
  • *
  • Guru: 15
  • Offline Offline
  • Posts: 9457
  • Vehicle: CJ-7 4.2 auto
  • Year: 1979
Re: 4ltr cherokee slow starting
« Reply #2 on: November 06, 2009, 04:39:33 PM »

PCM or generally called the ECU ?
Logged
XJ 2.5 diesel - dead. XJ 4.0 6" lift - sold to some lucky person
CJ7 4.2 auto standard(ish)
Alfa 147 jtdm

isle of man

  • بعض العضو التناسلي النسوي...
  • Club Member
  • Forum Member
  • *
  • Guru: 6
  • Offline Offline
  • Posts: 11537
  • Vehicle: G-Class AKA “The G spot”
  • Take the road less travelled...
    • http://www.4x4.im
Re: 4ltr cherokee slow starting
« Reply #3 on: November 06, 2009, 04:47:32 PM »

Yes...
Logged
"Not all those who wander are lost"

Dave69

  • Club Member
  • Forum Member
  • *
  • Guru: 15
  • Offline Offline
  • Posts: 9457
  • Vehicle: CJ-7 4.2 auto
  • Year: 1979
Re: 4ltr cherokee slow starting
« Reply #4 on: November 06, 2009, 06:22:40 PM »

thanks, fleabay here i come.
Logged
XJ 2.5 diesel - dead. XJ 4.0 6" lift - sold to some lucky person
CJ7 4.2 auto standard(ish)
Alfa 147 jtdm

Dave69

  • Club Member
  • Forum Member
  • *
  • Guru: 15
  • Offline Offline
  • Posts: 9457
  • Vehicle: CJ-7 4.2 auto
  • Year: 1979
Re: 4ltr cherokee slow starting
« Reply #5 on: November 12, 2009, 05:34:40 PM »

just fitteed a new (SH) ecu, now problem sorted as starting is straight away. Thanks for the pointer Mike
Logged
XJ 2.5 diesel - dead. XJ 4.0 6" lift - sold to some lucky person
CJ7 4.2 auto standard(ish)
Alfa 147 jtdm
Pages: [1]   Go Up
 

Powered by EzPortal