if there was a carb id know exactly what to do but there's not. I replaced the TPS, the old one was not giving continuity to the higher range points. I have had the throttle body off 3 times now and I am at the end of my rope.15 lbs of vacuum on the manifold holding steady, I can't find any vacuum leak, the MAF is clean and moves freely. if I rev up high before I load it up it will go. I can get the van to 60mph. I'm all out of ideas. when I step on the gas fast it dies out.
Have you checked for codes?
O2 sensor status?
Gwen
1985 5-speed window cargo van set up for llama haulin'; 345K ("Trustyvan")
1989 4WD 5-speed DLX; 410K and an odd sense of humor ("Skylervan")
Sounds like a cracked intake tube. While it's idling, squeeze the tube that goes from the air box to the throttle body. If it stumbles and/or dies when you squeeze, then that's your problem. For more info, check the 2nd post of THIS THREAD
I had a somewhat questionable hose, but I replaced it and it didn’t change anything. I haven’t tried the oxygen sensor. Does anyone know where that is? I’m also wondering about the temperature sensor that’s on the side of the filler neck is that something that can be tested? The van idles perfectly and doesn’t miss it just bogs like someone cut a hole in it if I step on the gasOriginally Posted by timsrv
Do you have any codes?
O2 sensor mounts into the exhaust pipe and is before the catalytic converter (1st gen vans only have the one, and it rarely throws a code when it goes bad in my experience).
That's what my '85 does — right at or just above 50mph only — when the O2 sensor needs to be replaced. It's inexpensive, so a good place to start anyway.The van idles perfectly and doesn’t miss it just bogs like someone cut a hole in it if I step on the gas
Gwen
1985 5-speed window cargo van set up for llama haulin'; 345K ("Trustyvan")
1989 4WD 5-speed DLX; 410K and an odd sense of humor ("Skylervan")
no codes at all
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