Air Mass Meter 1990 240 dl

  • Thread starter Thread starter Mike Henry
  • Start date Start date
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Mike Henry

If the resistance is correct across the #2 and #3 leads on the AMM can
it still be bad? What else should I check? If I replace it, should I
buy it new or used. How expensive are they in US dollars?

The car stalls and stutters at idle. I can not find any air leaks. and
am not sure what else to look for. I have given the car a complete tune
up including plug wires. Any other suggestions? I need some help!
Mike
 
When my AMM on my 93 240 gave me trouble, I went to an electronics
shop and bought contact cleaner (in spray). I generously sprayed the
inside and it fixed whatever problem there was. Unfortunately, it
will only extend the life of the AMM by about a few months. Repeating
this procedure, I added about a year to its life.

It makes a little while I bought one, but I believe it was more than
$200 from the dealer.

I've been told that they are quite sensitive to dirt.
 
Try using the car's computer to see if there are any fault codes
present. It's not hard to do and requires no extra tools. Find the
procedure on one of the Volvo sites .
I have an '89 240 and last year my car had a bad problem, car would idle
but that's about it, and I got a code for Air Mass Meter fault. I found
one on Ebay for about $65 delivered, plugged it in, and it's been great
since. I think they are a few hundred for a Bosch rebuilt. Don't get any
other brand. But a good used one will work. If the AMM is bad be sure to
check the hot-air ducting system for correct operation, as explained on
Volvo sites.
Richard
 
Unplug the AMM. If it starts and runs, it is more than likley the AMM. If
not check the main engine wiring harness where it connects to the harness
at the firewall and goes under the intake manifold. Cut the plastic sheath
back and inspect the wires. We had a problem with the insulation on the
wires getting brittle and falling off. That would cause a short on the AMM
causing the car to die.
 
Just a thought - have you removed and cleaned out the throttlebody and
associated vacuum lines? Can make a world of difference, even in a car that
seems to be running OK.

MKL
'91 245 5-spd
144,000 mi
 
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