P2074 CHRYSLER Manifold Pressure

[partyd]

2006 pt cruiser base, we did the head and timing belt last year
Now is having a problem and I can find the solution, I need help!!
car sounds horrible and idles bad 500 to 1500 rpm's jumping up and down all the time if I drive it runs ok but don't have too much power

a new manifold pressure sensor, pvc valve, vacuum connector from the brake booster was installed still the same problem
I replaced the intake and throttle body from the junkyard, still same problem

I can't find the leak, what else can I check?
thank you

[ptcruisersteve]

Originally Posted by partyd

ptcruisersteve I repair the TIPM, it was a bad capacitor and a few bad solder spots, also a little bit of water. I will upload the pictures later now i need a shower thank you for your help

I am posting a post that you posted a while back. I would appreciate if you would post the pictures. Thanks

[rckstein]

Do you have a base model or GT?

You had a previous thread from last year that you were looking for a PCM for a GT:

http://www.ptcruiserlinks.com/forum/...r-2006-gt.html

Did you ever replace the PCM? You can get a remanufactured one on Ebay if you still need one.

[ptcruisersteve]

P0274 = Manifold Pressure / Throttle Position Correlation; High Flow & Vacuum Leak

Possible Causes:

1. Vacuum leak in hoses or component connections
2. High resistance or resistance to ground in MAP 5 volt supply or signal circuit
3. MAP Sensor has failed
4. High resistance in MAP ground circuit
5. Throttle Position Sensor has failed or is improperly adjusted
6. High resistance or resistance to ground in Throttle Position Sensor 5 volt supply or signal circuit
7. High resistance in Throttle Position Sensor ground circuit
8. PCM has failed

Check all the hoses.

1. Inspect the Intake Manifold for leaks and cracks.
2. Inspect the Power Brake Booster for any vacuum leaks.
3. Inspect the PCV system for proper operation or any vacuum leaks.
4. Check all hoses on the turbo.

[partyd]

base pt cruiser.

[partyd]

Originally Posted by ptcruisersteve

I am posting a post that you posted a while back. I would appreciate if you would post the pictures. Thanks

I have to look for my old phone, I have an extra TIPM if you need one

[partyd]

Originally Posted by rckstein

Do you have a base model or GT?

You had a previous thread from last year that you were looking for a PCM for a GT:

http://www.ptcruiserlinks.com/forum/...r-2006-gt.html

Did you ever replace the PCM? You can get a remanufactured one on Ebay if you still need one.

Different vehicle, still looking for a computer, they are not available anywhere

[ptcruisersteve]

Originally Posted by partyd

I have to look for my old phone, I have an extra TIPM if you need one

That would be great! I will pay for shipping, etc. Thanks

Sending PM

[partyd]

Originally Posted by ptcruisersteve

P0274 = Manifold Pressure / Throttle Position Correlation; High Flow & Vacuum Leak

Possible Causes:

1. Vacuum leak in hoses or component connections
2. High resistance or resistance to ground in MAP 5 volt supply or signal circuit
3. MAP Sensor has failed
4. High resistance in MAP ground circuit
5. Throttle Position Sensor has failed or is improperly adjusted
6. High resistance or resistance to ground in Throttle Position Sensor 5 volt supply or signal circuit
7. High resistance in Throttle Position Sensor ground circuit
8. PCM has failed

Check all the hoses.

1. Inspect the Intake Manifold for leaks and cracks.
2. Inspect the Power Brake Booster for any vacuum leaks.
3. Inspect the PCV system for proper operation or any vacuum leaks.
4. Check all hoses on the turbo.

I spend all day checking everything, all the hoses are good, I replace one and use clamps for all of them
Almost everything was replaced, Throttle body with sensor and plastic intake map sensor, cam sensor, I took all the engine mounts to see the timing belt
and it's almost perfect, the intake cam is move half of a tooth but if I fix it, it will be half of a tooth the other way, I have done about 6 timing belts and sometimes they are not perfect, once In a different vehicle I was 1 tooth out and it run perfectly, I know timing belt is not the problem.
this car drives ok, but it's weak and it idles bad, my next option is the computer but I have to replace it without been 100% sure that the problem is there, i need to find a way to test it

[ptcruisersteve]

I would suggest using a vacuum gauge for reading, if the belt is off a tooth it will reflect in either a very high idle HG or very low. An engine that is in good condition will idle between 16-18 steady on most 2.4 engines. Post what you find.