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SVTPerformance's Chain of Restaurants
The Blower Bistro
Car won't start
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<blockquote data-quote="Red35thGT" data-source="post: 7726372" data-attributes="member: 28278"><p>update.....</p><p></p><p>I tested the tb for voltage and it isn't getting any voltage to it. MAF and TPS are fine, I went to Ford and talked to a few of the service guys and they told me that a bad O2 sesor could cause this. Ford said that there are numerous items that send reference voltage to the TB. Being as the only code that I'm getting on this car is in reference to the Bank one Catalyst sensor they suggested that I unplug it and see if the car would start. They said that these computers are very complex and if one system fails, that it will ignore that sensor and start reading another sensor to get the car to run in "limp" mode. For instance, if the TPS were to go out, the car would realize that it isn't getting signal from the TPS and it would start looking at the MAF to make its decisions on throttle. It will compare the amount of air coming through the MAF and the rpm's and use that to figure out where the throttle position is doing since the TPS has failed. </p><p></p><p>Anyway, back onto my issue. They suggested unplugging the O2 sensor since its showing a problem with it. Unpluggin it would make the computer use bank 2 sensor to make all the fuel adjustments it needs to. That in turn should make the car run if its just a fouled O2 sensor. Well, I came home and unplugged it, and it still won't start. Needless to say, I'm stumped on this one. They seem to think that its going to be something very simple such as a bad sensor somewhere. On intial start up, the car has signal to the TB, but after the rpms come up, it falls off. On start up, the computer sends the voltage to the sensor to open the TB since none of the sensors are operating to send it. Immediately when the car starts to build rpm's and all the sensors and monotoring systems come alive, the computer kills the signal to the TB and depends on various sensors and meters throughout the car to deliver a reference signal to the TB instead. Obviously, its not getting that reference signal. I can manually open the blades of the TB when someone cranks the car, and it will run as long as I am manually manipulating the throttle. So, I guess my next step is to start finding out what all sends reference signal to the TB and just start testing those. I'm gonna try to do this without getting frustrated and taking it to Ford. I just hate to pay them to do something that I can do myself. The part that makes me mad is that there is usually NOTHING that I can't fix on my cars. It may take me a while, and lots of studying and internet surfing to figure it out, but I always seem to do it. I'm starting to realize that I might have just stumbled across something that I can't do. lol. If I don't get it going soon, I'll just suck up and load it onto a trailor to deliver to Ford.</p></blockquote><p></p>
[QUOTE="Red35thGT, post: 7726372, member: 28278"] update..... I tested the tb for voltage and it isn't getting any voltage to it. MAF and TPS are fine, I went to Ford and talked to a few of the service guys and they told me that a bad O2 sesor could cause this. Ford said that there are numerous items that send reference voltage to the TB. Being as the only code that I'm getting on this car is in reference to the Bank one Catalyst sensor they suggested that I unplug it and see if the car would start. They said that these computers are very complex and if one system fails, that it will ignore that sensor and start reading another sensor to get the car to run in "limp" mode. For instance, if the TPS were to go out, the car would realize that it isn't getting signal from the TPS and it would start looking at the MAF to make its decisions on throttle. It will compare the amount of air coming through the MAF and the rpm's and use that to figure out where the throttle position is doing since the TPS has failed. Anyway, back onto my issue. They suggested unplugging the O2 sensor since its showing a problem with it. Unpluggin it would make the computer use bank 2 sensor to make all the fuel adjustments it needs to. That in turn should make the car run if its just a fouled O2 sensor. Well, I came home and unplugged it, and it still won't start. Needless to say, I'm stumped on this one. They seem to think that its going to be something very simple such as a bad sensor somewhere. On intial start up, the car has signal to the TB, but after the rpms come up, it falls off. On start up, the computer sends the voltage to the sensor to open the TB since none of the sensors are operating to send it. Immediately when the car starts to build rpm's and all the sensors and monotoring systems come alive, the computer kills the signal to the TB and depends on various sensors and meters throughout the car to deliver a reference signal to the TB instead. Obviously, its not getting that reference signal. I can manually open the blades of the TB when someone cranks the car, and it will run as long as I am manually manipulating the throttle. So, I guess my next step is to start finding out what all sends reference signal to the TB and just start testing those. I'm gonna try to do this without getting frustrated and taking it to Ford. I just hate to pay them to do something that I can do myself. The part that makes me mad is that there is usually NOTHING that I can't fix on my cars. It may take me a while, and lots of studying and internet surfing to figure it out, but I always seem to do it. I'm starting to realize that I might have just stumbled across something that I can't do. lol. If I don't get it going soon, I'll just suck up and load it onto a trailor to deliver to Ford. [/QUOTE]
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Car won't start
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