still TFI?

[spdcrazy]

hey guys, feel like i'm beating a dead horse here. but my 87 b2 won't hardly rev past 2400rpm. it idle's kinda rough and rev's smooth until 2400ish. i just replaced the TFI. and i don't have a multimeter to check and make sure its not grounding out. anything else i can check?

i have replaced the TFI,
checked grounds from battery/frame/etc.

it was running great last week! then moved from 70 degree days at 6000 feet above sealevel to 110 degree days and about a 1000 feet.

 

[holyford86]

pull codes, you're guessing without first doing that.

 

[spdcrazy]

i knew someone would say that. is there any other way to pull codes other than using the idiot dummy light flashes? i don't have the dummy light anymore so it might be difficult to watch it flash.

 

[IMenriched]

i knew someone would say that. is there any other way to pull codes other than using the idiot dummy light flashes? i don't have the dummy light anymore so it might be difficult to watch it flash.

check out the link from the tech library,
http://www.therangerstation.com/tech_library/OBD_I.html

for the tfi, you can remove and test at most parts stores for free, if you rell want to check it yourself, again ifound in the tech library.
http://www.therangerstation.com/tech_library/TFI_Diagnostic.html

 

[spdcrazy]

so either way i need a multimeter. good to know

 

[holyford86]

if you know someone with a diagnostic computer you can pull codes with most of them. I just picked up a bluepoint YA3140 and was well worth what I paid, even though it was in the $350 range. You can also pick up a cheap "code reader" for early fords which is basically a blinking light inside a fancy plastic housing for about 20 bucks.