I've got a '93 850 automaticwith a new issue! The car idles and starts fine, but, when I step on the accelerator quickly, it 'bogs down" for a few seconds, and , than revs up.It does this whether I'm in neutral or in gear. IfI step on the gas pedal lightly, it's not a problem!
I just changed the coolant, and, replaced the coolant temp sensor thinking it might be the problem, but, it wasn't.
Any suggestions are appreciated!!
Thanks, Tom

 

Any codes?

 

I checked the codes today using the on-board system. Here's what I got!
Fuel System Fault Codes were 1-2-1 ( MAP sensor signal absent or faulty) and1-2-3(Coolant Temp Sensor signal absent or faulty)
Ignition system FaultCode was1-2-3(Coolant Temp Sensor signal absent or faulty).
I just replaced the Coolant Temp Sensor! I ,also, checked the voltage @ the terminals and it was 5V per spec.
I ,also, removed the connector from the MAF while the car was idling, and, it stalled! Is thisnormal??

Any suggestions??

 

It should run with the MAF unplugged the computer goes into "Limp Home mode" and should run.

 

Clear the codes and see which one comes back.