2.7 4 Banger Hesitation

It's a process man. It sucks. Took me months to figure out my issue. The good thing is all of the things you are doing are good prevenetave maintmainte and youre only helping the situation as a whole. Keep on trucking amigo.

 

Hell Yes man. 1 thing at a time and it will be Running Great again

 

Any progress?

 

No But getting back to it soon. Have Not had time lately. Its Getting slowly worse

 

Check engine light came on this morning may lead me in the right direction

 

Code came back As Throttle Position Sensor. Already Have one.

 

Any Tips on this replacement?

 

I believe the FSM has all the information you need on replacing it. Do you have a copy?

 

No I Do Not.

 

Working on truck now. Removed throttle body and cleaned both Sides. Inner side was Nasty. Bottom Screw on TBS is being a pain.

 

New TPS is on. Need a new TB Gasket. Also Cleaned IAC Valve

 

All put back Together. Drove around a Little about 1am. CEL came on as soon as I got back and Pulled into driveway

 

Cleared CEL. Drove it this am No CEL Yet. No Hesitation but Bumper to Bumper traffic will Tell all.

 

CEL Back On again. Going to go have it read

 

Code #P0171 Bank 1 System 2 lean

 

There are multiple codes for TPS. Which code was it?

And a code doesn't mean immediately replace the part. It means there's a problem somewhere in the circuit, so test the part, inspect wires, etc. to find the problem before replacing.

Did you follow the procedure in the repair manual to replace the TPS? It requires aligning it perfectly so that the computer knows when the throttle is completely closed or just slightly open.

 

Problem NOT Solved unfortunately...

 

What have you done since the last post?

System lean could be an air intake leak or vacuum hose leak. Have you checked for leaks?

Low fuel pressure. Are any of the rubber fuel lines kinked?

Engine coolant temp sensor. Have you measured resistance of the sensor and compared to chart in the repair manual (temp vs. Ohms)?

 

CEL P0171 has Not Come back on. Some of my Vacuum Lines are Cracked. One from top of TB to Black Box, and from TB to Power Stearing. The Tips Crack when you try to put them back on. I have them taped up and clamped tight. Must replace those ASAP. Az Heat. I would like to find part numbers to as many as I can and replace. Or just find the equal size hoses at Auto Parts Store. Was told to Check IAC Valve and possibly replace. Want to also check Fuel Pressure. EGR Also. Funny it is more Responsive and runs much better when its Not Hot than it was when I first got it back on the Road. Really Struggled today in Phoenix as it was 114. I had to pull off the road and let it rest. It would barely get to 50mph. It also died on me in an Intersection.

 

It might be helpful to look at live data while you're driving. See what voltage the O2 sensor is putting out. It should be oscillating between 0.1 and 0.9 under normal driving. If it starts to go lean and the computer can't compensate it will get stuck at 0.1 volts. Then you'd know you are either losing fuel pressure or getting too much air in, and it would be less likely to be an ignition (spark) problem.

I know there are apps that will record the live data in a graph if you use one of those bluetooth OBDII readers, which you can get for cheap. Maybe something would show up as you start having problems. A sensor reading out of range, etc.