After 4 years of living with this problem on my 99 ES, it is finally fixed.

The problem: Engine jolts/jerks when A/C compressor is engaged at idle.

The cause: Leaky intake manifold gasket

Solution: Replaced Gasket.



It took 4 years for Mazda to figure out this!!!!!

Jerry Standefer, u listening? Get your car checked.

 

What happened to lean idle and the 1.8L simply being a bad engine desgin then, huh?

 

Like i said, the engine is weak at low end to being with.
a minor leak caused it to jump/jolt.

So my problem diagnosis was RIGHT.

The engine was running weak at idle. But not due to lean mixture, but due to a leakage.


Hey, I am no mechanic. But I was spot on.

 

we had a lot of 1.8 FS that had intake gasket leaks usually the side of # 2 runner port had been sucked in the gasket problem is known to Mazda and we have had a improved design gasket for about 2 years now.

 

How much would it to replace it.

 

that should be under Mazda's warranty, even after 4/50