Engine started running rough

Hello,

It sounds like you have a TPS sensor that is out but to be sure lets run the codes to see what comes up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please let us know what you find.

Cheers, Ken

What is a TPS sender and where is it located at? I had it checked and all I got was a oxygen sensor was bad which I replaced were is the tps.

The TPS can cause all kinds of problems here are diagrams to help you get the sensor replaced.

Check out the diagrams (below).

Please let us know what happens.

Cheers, Ken

TPS was a help, but when you put the it in gear it does not want to take the gas or it cuts out. Can you help me?

Tps was a help but when you put the it in gear it doesn't want to take the gas or it cuts out can you help me

I have a Ford f150 year 202 v6 4.2 the TPS was a help, it run good but when you put it in gear it runs rough. I do not want to pull it not the transmission it is missing or loading up or something. can you help please?

It sounds like you have a vacuum leak or the IAC motor is not working right can you please take a video of what the engine is doing and upload it with your reply?

This guide can help as well.

https://www.2carpros.com/articles/stall-at-idle

Please run some tests and get back to us.

Cheers, Ken

Where is the fuel injection pressure regulator on my truck and where is the fuel pressure sensor? help please. thank you

It runs good until I put it in gear.

When you put it in gear does it stall immediately? Like bang stalled or does it take a few seconds. Here is the fuel pressure regulator location which looks like its on the fuel rail and the fuel pressure sensor location as well.

Can you take a video?

Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers, Ken

It stalls, it will move but very little, I have to push on the gas a lot just to get it to move.

Is it the one with a little air line on top of the motor?

It almost sounds like the catalytic converter has broken apart and is closing the exhaust. Here it a guide to can try to confirm the failure:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please run down this guide and report back.

Cheers, Ken

Ken the truck runs good, but when you put it in gear it bogs down and but you put it in gear it runs good. I have had the catalytic converter cut off. so it is not that. Please help.

Can you take a video of what the engine is doing so I can see? Have you looked at the IAC motor. I would try that next.

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

Ken, I do not know how to take a video. Is the IAC motor? Is it a dealer part?

I cannot find it. Can you help? Thank you.

Yes, it is under the engine cover. here is its location.

Ken, the idle air control motor that is in the throttle body is it a dealer part or can I get it elsewhere? I cannot seem to find it.

Got it on Amazon $45.00.

https://www.amazon.com/gp/product/B00T1BWCNM/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=2carprcom-20&creative=9325&linkCode=as2&creativeASIN=B00T1BWCNM&linkId=ac8adb11c804f37dabf4e1406e4fef73

Let me know

I have replaced this no help. I do not know where to go from here. Can you help?

Ken this is a video of the engine running in gear and when you put in drive.

That does not sound good. Is that noise coming from the front of the engine or do you have the exhaust modified?

That is where I cut the catalytic converters off. Someone else said they were clogged so I cut him loose. You see that did not help. Still when you put it in gear it just bogs out down.

When it bogs down does it stall? Can you do a video of the problem when it stalls or?

When it bogs down it does it as soon as you put it in gear.

It does not. It is like it does not have the power or like loading up but when you put it in gear it runs good. I have lost all ideas. Help!

Okay, reading through this it gets a bit murky. In one post you say it runs okay until you put it in gear and another where you say it runs bad until you put it in gear.

You say you cut off the converters, what did you do with the 02 sensors?
It sounds like it is missing, what does the spark look like at each plug? You replaced a bunch of parts, was that before or after it started this?

This started before I had done anything before it run good no. Mis it just started one day and I cannot find it I have tried everything. I like my and cannot buy another one I am disability and I do not get enough to buy another one. Could you help please? Thank you.

Okay, so it was running fine, you shut it off, came back out and it then started skipping and lost power if you tried to give it any throttle. In response you installed a new timing chain, then O2 sensors, cam sensors, TPS, and removed the converters. After all those it still runs the same with missing and low power, but seems to idle fine.

Was there anything else like plugs, wires, coils? You say it only acts up when shifted into gear? Will it also drop out if you just put it in park or neutral and stomp the gas?
The video did not sound real good but it sounded like a lot of exhaust leakage was masking the rest.

What do you have for test gear?

I am asking all this just to get the problem clear in my head. I would be the last person to tell you to swap it unless it was something that the repair would cost more than a replacement engine.

It seems to do good in park you can give it gas in park and seems to do alright. Just when you put it in gear.

It does good in park and neutral you can give it gas it seems to do alright it seems to take the gas alright.

Okay, that sort of rules out that it is a wiring harness that is being moved around when you shift it into gear. What does it do if you manually shift it into low/second/drive? Does it still bog down and lose power?

I am thinking that it is possible the issue is not the engine but possibly an odd transmission problem. If the overdrive clutch were to lock on it would act the same way when you put it in gear because the converter would not be able to actually work.

I do not believe it has anything to do with the transmission it goes In gear and shifts fine it bogs down it is possible to be a short in the wire, but did not find nothing when I looked.

The thing is that it does not seem to act up until you put it into gear. Then you say it bogs down and has no power. That sounds a lot like the torque converter is damaged or locked up. Used to be a common issue on some GM cars. The converter clutch would lock on and while you could drive the car it would bog down and stall because the converter could not freewheel.

I just do not know I just cannot seem to be able to fix it it is not recognize my key now how do I fix that ?

Ken my key will not start my truck now. Can you help please? Thank you.

If it is not recognizing the key you may want to try another key. It could be a key failure only. Or it could be related to the earlier issue and be a faulty PCM. That would require a factory level scan tool to test the PCM itself.

The key all was work good before and it is the only one I have.

1998 and up use a PATS key. Inside the key is a chip (not really a chip but the same type of item used in store theft tags) this is programmed into the trucks anti-theft system and the system reads the key every time you try to start the engine. If there is a fault in the key, the anti-theft or the PCM the engine is not going to start. The first step is to try a different good key. However, having only one key means you cannot program any extras yourself as you need two known good keys to program extras without a scan tool or locksmith key programming tool. As this was a sudden failure it could very well be that the same issue that was causing the poor running has now failed completely. However, without a working key there is not any good ways left to test and you now need a high end scan tool that can actually talk to the modules directly to see which ones are working or not.

When you try to start it what does the security light do?