CHECKED VACCUM LINES ALL LOOK GOOD NO CHECK ENGINE LIGHTS R ON ?????
Good guess if it's not vacuum, it may be the intake manifold gasket allowing too much air into system. Easy teats to check is to spray some engine cleaner, or brake cleaner [ WD40 works too ] directly where the intake manifold bolts on. Making sure you are spraying the gasket. If gasket is bad, you will hear the idle go down or up. Any change at all tells the tale. . Be sure not to spray the exhaust manifold, just the intake manifold. This is the best test to perform Saves time and money. Let me know how you make out. PS Also spray vacuum hoses with the cleaner. Listen to motor at the same time
let me know how you do
THANK FOR ADVISE,I WILL PERFORM TEST AND LET U KNOW THANK YOU.
TRIED SPRAYING INTAKE GASKET AND VACCUM LINES WITH NO CHANGE IN IDLE STILL ,MIGHT I ADD MOTOR HAS ONLY 63879 MILES ANY SUGGETIONS
It could be you TPS throttle positioning sensor, bad AIC air ide control. or even a bad EGR valve. All of these things should be connected to , or very near the throttle body. You will have to take the sensors off to inspect them. The AIC will haver a mushroom shaped plunger. This may be dirty allowing too much air to get into the mixture. You will have to take the throttle body off most likely to get these sensors off, so while you have the TB off, its a good thing to scrape off the carbon , and wash it all down with varsol. Common thing. The TPS, there is no way to check it, but if you take it off and clean it up. It's a last resort type of thing. . Also while you are cleaning the throttle body, make sure you clean inside where the plunger seats good luck
You did spray the intake manifold while it was running I hope. I read back and forgot to say that. It has to be running at the time of spraying
YES IT WAS
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SOURCE: speedometer not working, high revs & won't shift out of low gear
Your issue is a bad "speed sensor". Your speedometer is controlled by a sensor in your transmission, and when it quits working your speedometer will not work, it can cause very irregular shift patterns and slipping. Replacing your speed sensor should resolve your issues.
I hope this helps you, and I wish you luck on your repair.
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