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International Automotive Technicians Network
Re: I988 F150 Runs bad under load after tuneup
Posted to Technical Discussion Forum on 1/22/2019

Grant, I said before, put a vacuum gauge on it.

Maybe a unrestricted gauge. Some have a small restriction plug in them, this will slow down the needle movement. So, what type are you using?

Start it up and idle, what does it do or read?

Now, start increa... Login to read more.