After checking the compression,right side all cylinders very low or zero,right side good. I pulled the right valve cover.The timing chain is broke. I called the shop were I bought the motor. He will replace it for free. I need to pull it and take it to him. I knew this ahead of time he has it in writing on his warranty, that he pays no fees for removing or installing. While working on it I also noticed both head have a very small coolant leak,so might be best thing in the long run.
Thanks for your help.

 

Right side no compression,left side all cylinders good.

 

Originally Posted by Econoline Pickup
I know it was on 45 min earlier because I got gas. Did I forget to put in back on? probably..But I wondering if the missing gas cap could cause the truck to run bad,vary bad???
Thanks for any ideas


Yes, a missing gas cap can really mess you up. Wrong gas cap on my '99 F150 caused intermittent shudder that was diagnosed by garage as either a bad torque converter or bad coil misfire. A new OEM $12 gas fixed the problem. Also I had a '13 Subaru Legacy that went dead on the highway when the gas cap was left off.

 

No, it won't. Go back and read post #4. A missing gas cap is completely different from a WRONG gas cap.

 

They ARE two different things--missing versus wrong cap--but a missing cap sure did stop my '13 Subaru dead on the highway. The wrong cap made my f150 misfire but it still ran.

 

Whatever happened to your Subaru isn't relevant to a Ford. Fords have no such vulnerability.

The WRONG gas cap on a Ford can cause the tank to not vent when fuel is used and will lead to the engine being starved for fuel.

 

I'm not sure what your issue is. I said that the wrong cap caused a shudder in my f150, not that it killed the engine. So I don't see that I have a disagreement with you. I repeated it because someone previously stated that that could not happen, but it certainly did. You seem to agree that the wrong cap can cause the engine being starved for fuel so have a nice day & thanks.

 

On a Ford 2 pipe system, if a cap is used that does not vent and allow air in, or a pressure buildup out, you can get one of two results besides the system not passing the complex PCM tests.
No pressure venting can cause a rich condition for the motor under certain circumstances if it goes on long enough.
A no vent that causes a vacuum to form in the tank will eventually make it hard for the fuel pump to draw fuel causing a possible lean condition at the injectors and drivability symptoms if it goes on long enough.
A no cap situation will normally 'not' cause a drivability issue but will cause a code because the PCM testing will not pass an open tank test conditions. It sees it as a 'gross' test condition leak.
On Ford, the system detects a fuel cap removal at fueling time along with tank level changes and an engine stop start cycle.
The program handles this in a special way that does not result in a CEL or a code as long as the tank is caped again with a non faulty cap so the user is not bothered by a CEL for no good reason..
The tank testing and system design all comes about because of an EPA mandate that the fuel and it's vapors cannot be allowed to leave the system by evaporation, spill, leakage or other means except to be consumed by the engine.
The testing detects all these conditions by very elaborate program and associated hardware .
*
On another make, the designer may equip the system to cause other effects, indications or actions to take place.
You cannot compare one make to another unless you know how the systems work on each.
Good luck.

 

Thanks for the great & clear explanation.