I have a simple problem...

As soon as my 230,000 km volvo turns warm(at the mid temperature level), it responds normaly to everything, my problem is before it heats up,

- It first doesnt respond correctly to acceleration.

- Also when I accelarate, it backfires.

- And THIS is ONLY when the engine hasnt reached it's warm temperature.

- Also when I restart the engine when warm, it sometimes has to turn a bit before starting.

I have changes my spark plugs, wiring, distributor rotor. I have tested(as suggested on the board) disconnecting my AMM and it does not want to run when I push the gaz pedal, it dies(so this should mean the AMM is good...yes or no ?). When I disconnect my FPR hose(to the engine), my idle barely accelarates.

I am convinced that this cannot be very complicated as a problem otherwise it wouldnt run so good when warm...PLEASE help me I dont really have the budget to go trough the run around of a shop mechanic.

Thank you so much for your suggestions if you help me.

Denis Parent

I hope we get some answers here......i have similar problems....car runs very poorly till warm up.....no throttle response, very sluggish...lots clicking....but warm everything is fine.....i do have a loose wire at the distributer, the ones that go to the hall sensor.....i have suspected the hall sensor.....havent tested or otherwise fooled with the amm.....have a new fpr, new temp sensor (for computer)....its like my car doesnt know its cold and is trying to run warm all the time....or it doesnt know where the timing should be.....come on experts.....HELP!!!!!!

Hey thanks for getting me not to feel to alone we are two with the same problem...lol, it doen't make it any better but anyways.
You mean to tell me that you have changed your fpr and new temp sensor and it still does the same....pffffffff, I honestly think I will have to take it in to a specialist, I got to know this little garage that owns 3 like mine and he loves reparing them,in fact he only has these oldies on his lot, so i guess I'll go and see him soon.

If you get any suggestions please tell me about them.

Thanks

Denis
denispa@sympatico.ca

your description sounds like a classic mass air flow problem, check for codes, code 121 is a maf

Where do I see or read that code you're talking about.....