I recently posted a couple of threads trying to solve a problem with my 86 22r hesitating under certain acceleration.

I've finally fixed it and want to give back to the forum and all those who helped.

After a blown head gasket, I replaced the head with a Street RV head and cam from engnbldr and renewd other various parts, the truck developed a hesitation when accelerating, mostly when 'hot'.

I checked EVERYTHING; vac lines, ignition, EGR, BVSV, AAP, etc etc.

One symtom was that the temp gauge was not registering at the same spot as before but I assumed that this was because the head gasket had been causing a warming reading before it blew and the engine was running better now.

I finally worked out, with lots of hints for this forum, that maybe I had a 180* thermostat instead of a 195*.

It turns out both are acceptable and my local parts stores (one of which sold me my new 180* stat) told me that 180* was regionally correct. There were conflicting opinions from various bloggers.

After 2 months and endless hours, it took $8.95, two bolts and 15 minutes to completely fix the problem - a 195* stat!

Obviously the engine was not coming up to temperature and not shutting down all the cold start systems.

I wanted to share this and say thanks to all that helped - directly and indirectly. Hopefully it may help someone else in the future.

 

Did you use the 195*? Mine runs cool and I get crappy mileage.

 

It now runs with a 195*. What are you using?

 

Don't know, it's been in there since I got the truck many years ago. I'm going to get a new one from the stealership today!

 

The dealership wanted $20. Be warned. PepBoys sold it for $8.95.

 

I get wierd/funny hesitation with mine. Mostly when its a bit cold but if I stop and turn the car off and leave it for 5 mins and turn it back on again, it has the hesitation problem for a few mins before it seems to fix itself up.

Generally when the engine is warm and has been for at least 5-10 mins its fine.

I gave up trying to fix it but if its only an $8.95 part and 15 mins I might give it a try.

 

My truck (when it ran) would hesitate on its first excelleration of the morning when it was cold out. After that first take off it wouldn't do it again. Not sure if it was just warmed up enough by then or if I subconciously revved it higher when I would leave. Good info to know though as I'll be fixing my truck this month hopefully