Who wants more power out of their 87 or 88?
#62
::CF Moderator::
Thread Starter
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
#63
CF Veteran
Join Date: Aug 2009
Location: 9000 ft, CO
Posts: 1,075
Year: 1999 XJ
Model: Cherokee
Engine: I6 4.0L

Curiosity has gotten the best of me and I'm off to the junkyard to see if this will work for the 4banger as well. With an '86 (TBI) I just need to find one older than '90, correct?
#64
::CF Moderator::
Thread Starter
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0

90 with throttle body injection?
#65
CF Veteran
Join Date: Aug 2009
Location: 9000 ft, CO
Posts: 1,075
Year: 1999 XJ
Model: Cherokee
Engine: I6 4.0L

I pulled one from an '89 that I put in last night. Startup to a smooth idle is quicker and it idles better. Can't believe it worked. I'm interested to see the fuel savings in a few days. The '86 thru at least '89 had a single injector on top of the throttle body- not sure about '90.
#66
::CF Moderator::
Thread Starter
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0

I pulled one from an '89 that I put in last night. Startup to a smooth idle is quicker and it idles better. Can't believe it worked. I'm interested to see the fuel savings in a few days. The '86 thru at least '89 had a single injector on top of the throttle body- not sure about '90.
#67
Seasoned Member
Join Date: Mar 2013
Location: California
Posts: 311
Year: 1987
Model: Cherokee
Engine: inline 6

Coulda swore it felt like my 89mj had more power then my 87mj but my ad said I was full crap. Guess I was right.so for my 87 what numbers do I look for in the upgraded one.manual 2wd metric ton.
#70
::CF Moderator::
Thread Starter
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
#71
Seasoned Member
Join Date: Mar 2013
Location: California
Posts: 311
Year: 1987
Model: Cherokee
Engine: inline 6
#72
::CF Moderator::
Thread Starter
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0
#75
::CF Moderator::
Thread Starter
Join Date: Aug 2011
Location: Prescott, Az
Posts: 37,367
Year: 1990
Model: Comanche
Engine: 4.0

Update on my neighbor's 87.
Put the volvo injectors in.
0 280 155 746.
What a pleasant upgrade!!
Quicker starts, better throttle response and a bit better MPG. And mind you, we did this for safety reasons as the original injectors can split and spray fuel on your hot engine. This 87 already ran great with a late model eCU and TCU and we weren't expecting much improvement. Nice.....
Put the volvo injectors in.
0 280 155 746.
What a pleasant upgrade!!
Quicker starts, better throttle response and a bit better MPG. And mind you, we did this for safety reasons as the original injectors can split and spray fuel on your hot engine. This 87 already ran great with a late model eCU and TCU and we weren't expecting much improvement. Nice.....