Toyota - Corolla :: 2006 - Car Is Losing / Gaining Power - Tachometer Goes Up And Down
Jul 10, 2011
The problem began a year ago when the car would randomly lose power while hubby was driving it, and then regain power almost immediately and continue to move forward. Weird. Fast forward a year and the problem is happening more frequently. Couple that with the car taking a lonnnnng time to start up in the morning. One day, it ceases to start altogether. Had a mechanic friend of ours look at it and tell us we need a new fuel pump. Okay, no problem. We paid him for the pump and he installed it. Before I could dance a victory dance, though, as hubby turned the key....the car still won't start. Mechanic buddy takes another look at the car and said the ECM is cracked and needs replacement. Looked it up online and ECM is covered under safety recall. Had car towed to the dealership, waited 2 weeks on ECM replacement, dealer called us up to let us know that....the car still won't start, and looks like we need a new fuel pump.
Mechanic friend took another look at it and said it looks like a bad connection between the pump and made an adjustment to it. The car works! Sort of. Car starts acting funny again. We're driving along and the car is losing/gaining/losing/gaining power, tachometer goes up and down, we hear a funny clicking coming from the dash area every time the car loses power. Last night, the car just refused to start. This morning, it started. After several attempts. Made that fun "verr-verr-verr-verr-verr-verr" sound without the "-rooom" at the end. Since my knowledge of fuel pumps and their casings, ECMs, and the like are limited to this situation, I'd love to know what's REALLY going on with the car. I have a suspicion that it goes beyond the fuel pump situation, but mechanic friend thinks it is the casing or something like that.
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2nd I noticed today that when my truck is at idle the Tachometer is at 0 and when I'm driving 60-70 MPh it goes up to 900 or maybe 1200. It seems to be running fine no loss of power that I can tell. What could be causing the long crank time and my Tachometer problems.
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Also, without a multimeter, how would one know which lead is positive and which is ground?
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Another disturbing piece is that about a month ago my temperature gauge joined in and will now remain at zero the entire time the tachometer is flailing about and then when simultaneously they will begin working normally.
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I have a 2006 Rubicon Wrangler 4.0 (automatic) with 15K miles, excellent cond. When I drive up to the mountains my Jeep loses power to the point I have the gas pedal pushed to the floor, whereas I can jump out of the jeep and run along side of it. When I step on the gas on the freeway going at high speed it dogs down. It runs fine driving around town. I never had this problem before. I don't think its a transmission problem because I have no engine light coming on. I just checked the Catalytic Converter and that's ok. I'm lost, I have no clue what it can be.
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