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Old 06-13-2012, 07:19 PM   #71
spiller
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I bet there is still a vac leak, possible cracked intake manifold but that's a guess, tap the throttle with a cutted tire tube fitting the valve over and seal it do 3-4psi and spray soapy water all over the IM, IAC, vacuum hoses, booster, etc. it will bubble right up.
I like this possibility, but I don't understand your testing procedure... Could you explain again?
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Old 06-13-2012, 07:59 PM   #72
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Is adding air through the throttle and checking for leaks like it was a tire, I cutted a tire tube piece with the valve and fitted in place, clamp it to seal it and add 3-4psi, in some cases you will hear the leak but if sprayed with soap and water it will bubble wherever the leak is, IAC may leak a bit through the top but not on the flange.
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Old 06-13-2012, 08:10 PM   #73
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Fuel pressure on the ZETEC is regulated by the ECU, Fuel Pressure Sensor and the Fuel Pump. (Unlike the SPI which uses an pressure regulator controlled by vaccum.) If the Fuel Sending unit was replaced due to recall, there still could be trash in the line clogging the fuel flow dampener or fouling the sensor. A reduction in fuel flow can occur while pressure is maintained.

Each of these parts are over $100 each. But may be on your inspection list.
this is just so much information to absorb and I don't really understand it...I am hoping the guy/mechanic who has my car is reading all of this.......
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Old 06-23-2012, 08:04 AM   #74
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Any updates? I wouldn't mind knowing how the new guy did.
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Old 06-23-2012, 12:18 PM   #75
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[QUOTE=oshoguno;4227597]Any updates? I wouldn't mind knowing how the new guy did.[/QUOTE

Well, he tried changing the computer but that wasn't the problem...He was working on it in between working on other cars...not sure if he checked the timing ..he said if it was the timing it would throw a code..anyway, he did change the tps but no change and now the shifting is all messed up but he said the old tps just about crumbled when he took it out...bottom line is , I am going to pick the car up and just park it in my garage until I can figure out what to do with it...he has been very very fair money wise and I will continue to use him for my other vehicles...he actually said he was not gonna let this car defeat him but I decided to let him off the hook...I guess I will just park it in my garage until I can decide what to do with it....
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Old 06-23-2012, 12:38 PM   #76
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Too bad, I hope you find a way to fix it. Good luck.
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Old 06-24-2012, 06:58 PM   #77
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The pressurized intake idea won't work if any intake valve is open, the intake needs to be off motor and port face sealed.
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Old 06-24-2012, 07:02 PM   #78
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Actually that's not even true, the cylinder would pressurize up too, unless you just happened to be on overlap. Then it would never seal at all.
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Old 06-24-2012, 08:56 PM   #79
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The pressurized intake idea won't work if any intake valve is open, the intake needs to be off motor and port face sealed.
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Actually that's not even true, the cylinder would pressurize up too, unless you just happened to be on overlap. Then it would never seal at all.
It does work, that's how I find vac leaks in mine...of course I'm not the only one...also has to be putting 3-4psi constantly.
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Old 06-24-2012, 09:56 PM   #80
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[QUOTE=cma8302000;4227823]
Quote:
Originally Posted by oshoguno View Post
Any updates? I wouldn't mind knowing how the new guy did.[/QUOTE

Well, he tried changing the computer but that wasn't the problem...He was working on it in between working on other cars...not sure if he checked the timing ..he said if it was the timing it would throw a code..anyway, he did change the tps but no change and now the shifting is all messed up but he said the old tps just about crumbled when he took it out...bottom line is , I am going to pick the car up and just park it in my garage until I can figure out what to do with it...he has been very very fair money wise and I will continue to use him for my other vehicles...he actually said he was not gonna let this car defeat him but I decided to let him off the hook...I guess I will just park it in my garage until I can decide what to do with it....
Sounds like your guy is a parts changer not a Mechanic , A Mechanic would check with a scan tool and find out what is wrong before randomly changing parts that are not bad with your hard earned money

Find some one with a xcal2-3 and do some datalogging , I will be glad to look them over and I dont charge for this

Tom
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