1988 runs rough only at 1500 rpm

[rysaro]

My 88 5.0 recently started running rough and shuddering at around 1500 rpm. Feels like I unhooked about 3 plug wires. Idles fine, runs fine at higher rpms. Any sugggestions?

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[biddle]

Here is a reply I found from a Ford Mechanic on this topic. Obviously it can ke a number of things, even automatic transmission related. But here is what he said:

This could be a leaking hose connected to the MAP sensor, so I recommend checking the hose for any cracks and loose clips first. Then, inspect the wiring and connector for any signs of corrosion or damage. If everything appears fine, it’s possible that the MAP sensor itself may be faulty.

It might also be beneficial to clean out the idle speed control motor or valve, as these can become clogged with carbon. Using some brake cleaner to wash through can help free things up.

 

[rysaro]

Thanks for the reply.

Ok, I ordered one. Will give it a try and let you know.