PR850TURBO Posted February 2, 2007 Report Share Posted February 2, 2007 Hi everyone:The ICV stays on in my car even when the Throtle is in closed position???It's that normal or my ICV is no good?My car started up, rev's to 3K and stay there. After that, it doesn't want to start.Check the coil, and it's Ok, but the sparks seem not to get power. Fuel is Ok. I'm thinking is the Distributor Rotor? Any assistance welcome and appreciated.Thanks,Vic Link to comment Share on other sites More sharing options...
Guest Guest_850T-5_* Posted February 2, 2007 Report Share Posted February 2, 2007 That kind of high idle is "typically" a sign of an IAC or TPS problem . . . .First check to make sure none of the turbo hoses have any cracks or have slipped off, also check to make sure none of the vacuum lines have cracked or popped off . . . .Pull the IAC, spray it out with throttlebody cleaner, could be gunked up and sticking. They usually don't just suddenly fail, it's usually because they get gunked up and stick. Pull the hose that goes to the throttlebody, make sure it isn't gunked up where the throttle plate is sticking. Also confirm the rubber elbow and hose that goes to the IAC isn't cracked. Also confirm the TPS connector is attached and maybe even clean it if it looks dirty. Might not hurt to also pull the AMM, spray the sensor eliment generously with electronics parts cleaner, also clean and check the connections. Not quite sure why it now doesn't want to start, but this is a good place to start. Wouldn't hurt to do new Volvo OE plugs (work best in these vehicles), Bougi wires if due, BOSCH cap and rotor also don't hurt. NNo start can often be caused by a weak battery (you can have it checked for free at most autoparts stores), bad Fuel Pump Relay (make sure you hear the pump prime when key is in the on position), or Fuel Injection Relay. Link to comment Share on other sites More sharing options...
PR850TURBO Posted February 2, 2007 Author Report Share Posted February 2, 2007 That kind of high idle is "typically" a sign of an IAC or TPS problem . . . .First check to make sure none of the turbo hoses have any cracks or have slipped off, also check to make sure none of the vacuum lines have cracked or popped off . . . .Pull the IAC, spray it out with throttlebody cleaner, could be gunked up and sticking. They usually don't just suddenly fail, it's usually because they get gunked up and stick. Pull the hose that goes to the throttlebody, make sure it isn't gunked up where the throttle plate is sticking. Also confirm the rubber elbow and hose that goes to the IAC isn't cracked. Also confirm the TPS connector is attached and maybe even clean it if it looks dirty. Might not hurt to also pull the AMM, spray the sensor eliment generously with electronics parts cleaner, also clean and check the connections. Not quite sure why it now doesn't want to start, but this is a good place to start. Wouldn't hurt to do new Volvo OE plugs (work best in these vehicles), Bougi wires if due, BOSCH cap and rotor also don't hurt. NNo start can often be caused by a weak battery (you can have it checked for free at most autoparts stores), bad Fuel Pump Relay (make sure you hear the pump prime when key is in the on position), or Fuel Injection Relay.Thanks for the info.All the hoses are new and I cleaned the IAC. I looked loosed. Spark Plugs are new, Rotor cap is maybe a year old. Now, the plugs looked black, meaning a rich condition. Would that prevent the car to start?How I can check that spark plugs are getting power?What's the "AAM"?Thanks again,Vic Link to comment Share on other sites More sharing options...
Guest Guest_850T-5_* Posted February 2, 2007 Report Share Posted February 2, 2007 AMM (Air Mass Meter), alsor referred to as Mas Air Flow Sensor or MAF, right on the airbox there . . . .Even if the turbo hoses are new, check them anyway, maybe a clamp wasn't tight enough and the hose is slipping off or something. Even if it "looks" ok, double check and make absolute sure anyway. If the plugs are black, they could be fouled. Again, make sure you are running Volvo plugs, DEFINATELY DO NOT run BOSCH platinum plugs or any plugs with a pinprick electrode because they'll foul really easy. Maybe the plugs are fouled. Also check the vacuum line that goes to the Fuel Pressure Regulator, check to make sure the rubber vacuum elbows aren't cracked and are on snugly. If everything else definately checks out:If you started it up then beat it off without letting it run for a bit, it is not uncommon to have a sudden no start condition. It is thought to be caused by lifters causing 0 compression or sticking rings I think. If this turns out to be the case, pour about a few OZ of Marvel Mystery Oil in the gas tank and the rest in your engine. This will help unstick lifters or free sticky rings. While cranking try and give it a bit of gas in this case. Of course check everything else mentioned first or you might just be wasting your time with this. Link to comment Share on other sites More sharing options...
Guest Guest_850T-5_* Posted February 2, 2007 Report Share Posted February 2, 2007 sorry "shut it off", I meant . . . . Link to comment Share on other sites More sharing options...
pfeener Posted February 3, 2007 Report Share Posted February 3, 2007 Step back for a minute. The throttle plate and the IAC serve the same function....they let air into the intake manifold. Letting more air into the intake manifold, no matter where it comes from, will cause the engine speed to increase. Look for leaks anywhere that will let air into the intake manifold such as loose/leaking intake manifold gasket. Link to comment Share on other sites More sharing options...
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