I recently bought a 1978 FJ55 and had it shipped from Nova Scotia to Midland. Everything on it is original and it has the 2f straight six and has been de-smogged so no EGR valve or anything. It fires up right away and idles well. it runs down the road great for about 15 minutes. Then it starts to act up. If im at higher speeds, like 80-90km an hour (55mph ish) and I need to accelerate or say step on the gas to go up an incline the truck jerks and stutters. If I slow down to a stop and run through the gears again it seems fine until I get back into 3 and 4th gear. And this only happens when the truck gets warm (not overly hot) and it's hot outside. I haven't had it do this when I run it in the evening, but im about to take it out on 307 and run it toward Stanton and see if it acts up at night.
I was thinking maybe a vacuum issue or power valve but hoping someone else has seen this issue before. I'll try and get a video of it running both good and bad.
Any thoughts?
I was thinking maybe a vacuum issue or power valve but hoping someone else has seen this issue before. I'll try and get a video of it running both good and bad.
Any thoughts?