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Old 01-19-2012, 04:26 PM
Musik101 Musik101 is offline
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Default 2.3L 1997 still having sputtering problems. UPDATED INFO

Ok so I have posted similar posts, but I want to give a more up to date post.

As stated before when I start the engine it idles, but there is a miss in one or more of the cylingers. When I try to give it gas it will rev up normally for a second and then sputter and then maintain the rev that I am applying and sputter (lose horse power), and repeat.

I have also let the truck idle and bumped up the revs for just a second and released. After releasing the throttle position the engine maintains the revolutions I applied a second ago and the engine will hold this for approx. 3-5 minutes and then idle back down (some times too low).

Here is what I have done to the truck so far:

1 Removed as much fuel form the fuel tank.
2 Installed new air filter.
3 Cleaned the MAS.
4 Tested the IAC, checked out ok.
5 Tested the injectors, checked out ok.
6 Tested fuel pressure while running and not running, checked out ok.
7 Cleaned the throttle body.
8 Replaced the head gasket as well as the intake manifold gaskets.
9 Checked for vaccum leaks with starting fluid, none found.
I am sure I am missing something but that pretty much sums it up.

As for things that I have questions about or have noticed:

1 There doesn't seem to be any voltage going to the throttle position sensor.
2 ECM harness connector at the computer is damaged which might explain the voltage issues.
3 When I unplug the throttle position sensor electrical connector nothing happens.
4 When I unplug the vacuum line that is connected to the EGR nothing happens as well.


I cannot for the life of me figure out why the engine is missing and why it sputters so bad when I give it any gas. And the engine light works but it is not indicating any issues. Meaning it is not on while the truck is running.

Any advice would be awesome,

Thanks

----------

Also, the Coil packs and wires are good as well.

Once thing I forgot to mentions is the idiotic mechanic whos idea of checking for a vacuum leak is to use a water hose and run water over the usual suspects. I can confirm that there is no water in the oil, as for in the cylinders, to the best of my knowledge any water that was visible (which was not much) has been removed.

What would happen if water was accidentally put into a loose PVC and entered the engine there???? That might be a possibility.
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1997 2.3L Ford Ranger ( 8 Plugs )

Only modification is a Flowmaster Exhaust and a Magnaflow Cat.
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