What are the symptoms of a bad AFM?

The car runs fine at idle, or slight gas it cuts out some. But with mod to full throttle, it just bogs.
Acts like a clogged cat. But I think it was rodded through.

If the throttle body was leaking, could it cause this?
I'll look more into it monday.What do you think is wronge?

This is a stock na 1.6.

 

whats wrong is you have megasquirt and STILL have a craptastic AFM, throw it out!

 

Naaaa that car is afm delete. Both turbo cars run good.

I'm talking about a stock (Non turbo) NA car I'm trying to fix.

 

plugs clean? Wires good? do you have a spare afm sitting around u can swap and compare with? Is your fuelpump still running or is it cutting out? If all the above hold true ubolt ur kitty and tryer out. From there it goes into alot of posibilitys.

 

put a vac guage on it, let us know how much it pulls at idle.

 

Yea, I haven't had time to check anything yet. I'm going check tommorrow night.

I can't hear any vac leaks.
But good thought, I'll check that.

 

recently i have a bad leak on my lincoln, but i couldn't hear it either. car ran like **** and only had a couple inches of vac.

 

I have $0.01 and a paypal that says its plugs/wires

(my car was the same way when I bought it)

 

Idles fine, slow in 1st, bogs down BAD in first.

EGR has been removed. New plugs/wires. My thoughts are around the AFM. Since my symptoms are the same as the original post I wonder what the problem was finally diagnosed as!

 

What did you find out?

 

This is a 2 year old thread.

Google and try searching here and miata.net for info.

EDIT: check the coil pack too.

 

Yeah, we might have burned him at the stake for making a new thread without searching. Kudos to him for searching, but...

Unfortunately with a two year old thread you're probably not going to get much help from the OP, he's either gone, bought a MS, or forgotten what he did to fix it.

Try swapping it with a known good one, hopefully you have a fellow miata friend local to you.

 

old thread but help the new guy. Yes, try to borrow an AFM locally to see if that is is. I had a bad one and it had the same symptoms. replaced with a known good one and it cleared up the problem.
good luck