Working on my 1985 toyota pickup, it was swapped to the 22re by previous owner. It seems to warm up at about 1400ish rpm and slow raises from there to 1900ish. Also during this time, it has stumbles regularily while idling. Just looking for advice on what it could be, and things to check into.

The guy I bought the truck from said the truck has a walbro 255 in it, and I come from the import car world and you really cant just put that size fuel pump in with out a afpr to control it. Could that be part of the issue?

Thank you

Doug

 

I have a Walbro 255 on my 3RZ swap, and I used factory FPR on it. Haven't had any issues. The 22re has a FPR on it as far as i know, but whether he did another one or not, I don't know.

 

I am sure the truck has a fpr but I know on cars I have dealt with before if you do not have an adjustable fuel pressure regulator the car will run rough as the larger fuel pump is over flowing the stock fpr.

 

check the simple things first like vacuum leaks, dirty throttle body or idle air control valve aka auxiliary air valve, etc.

 

sounds like a vacuum leak to me...

 

Might check if the FPR has the vacuum line connected to it and that there is vacuum present:
- http://www.4crawler.com/4x4/CheapTri...ine_Pix/8.html
- http://www.4crawler.com/4x4/CheapTri...ine_Pix/9.html
- http://www.4crawler.com/4x4/CheapTri...ne_Pix/10.html

If not, pressure is too high at idle and it won't run right.