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sprinkles08, Chrysler/Dodge/Jeep master tech
Category: Dodge
Satisfied Customers: 22803
Experience:  ASE Master and Advanced Certified, Chrysler/Dodge/Jeep Master Certified, Trans and Hybrid Specialist
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Dakota: I have a 2007 dodge Dakota that just had the engine

Customer Question

I have a 2007 dodge Dakota that just had the engine block replaced. Popping a P2074 code. It's very difficult to start and to keep it running you have to be on the gas pedal. It's not getting enough air into the cylinders for some reason and I can't figure it out. Replaced the tps, MAP sensor and have taken off the intake manifold and replaced the gasket. Went over all of the clamps and bolts and checked over all of the tubing for the intake to make sure it wasn't a vacuum leak. Took off the timing chains to make sure it wasn't a timing issue and replaced the EGR sensor along with one of the manifolds because it was warped. Don't really know what else it could be and any help would be nice. Thanks
Submitted: 2 years ago.
Category: Dodge
Expert:  sprinkles08 replied 2 years ago.
Hello and welcome to JustAnswer!
P2074 sets when there is a correlation issue between the MAP sensor and TPS signal, a large vacuum leak has been detected. This sets when MAP vacuum is substantially lower than it should be with a low throttle angle. The most likely causes for this would be the TPS, MAP sensor or an actual vacuum leak.
Why was the engine replaced?
Has MAP vacuum on a scan tool been checked against a mechanical gauge?
Customer: replied 2 years ago.
The engine was replaced due to a piston pin breaking and cracking the cylinder wall. The TPS and MAP sensors have both been replaced twice and the gaskets from the intake manifold up have all been replaced along with checking for any holes in the manifold and the intake box. I have checked the sensor on the scanner against an analog pressure gauge and it's showing correctly.
Expert:  sprinkles08 replied 2 years ago.
Has the TPS signal been verified correct?
Customer: replied 2 years ago.
Expert:  sprinkles08 replied 2 years ago.
What is the TPS voltage with the throttle closed?