need help with boggin problem

[1994]

i have a 1994 ranger 3.0 auto and it boggs bad when u first take off but after a few miles down the road then it totally stops. its verying annoying and didnt know if someone need wat would cause these. the truck has 49k oringal miles. it has new plugs and wires cap and rotor ,tps ,intake manifold gaskets, fuel pump plus regulater ,mass airflow has been cleanied also. new cat and muffler also. wandering if u guys had any ideas on wat i could check

 

[1994]

anyone?

 

[Viper Command]

Did it start doing it after the tune up?

be shure the wires are cliped all the way and or the plugs are too cold, call ford and use the right plugs (stock)


also welcome to TRS....

 

[1994]

its always done it since i got the truck. i used motorcraft plugs when i did the tune up. part number SP493

 

[Viper Command]

do you have access to a scan tool/ data logger? or live in so.cal.?

have you checked the secondary resistance of the coil? ( postive coil input to output termnal should be 4.8k to 8.8k ohms)

cap and rotor look good? is it timmed right (checked when the shorting bar removed)?

I have seen harmonic ballancers rotate on the crank mount, it caused rough idle, harsh vibrations, and the timming marks moved, be shure the rubber isolator is recessed. flush, bulging, cracked, and missing rubber needs to be replaced.

 

[1994]

i had a friend of mine with a snap on scanner check it and he couldnt find anything wrong with it. the timing is set at 12 degrees i advanced it 2 degrees over the stock 10 and it runs alot stronger after i did that. and i havent checkied the coil yet. and it has a new timing chain cause the old one had alot of slack in it

 

[Viper Command]

get a spark checker and test the arc jump on the coil.

 

[1994]

how do u do that?

 

[Viper Command]

I use one of thies

http://cgi.ebay.com/ebaymotors/Coil...t=Motors_Automotive_Tools&hash=item20b82f642b

and see how much the arc will jump then test it to another coil.

but then agin a new coil is only about $30 for a msd coil from autozone.

 

[volrath]

is it an automatic? the kick down cable may be acting up. of a sticking valve in the tranny...

BTW the spark checker like he linked to are great to have anyways. i work on a lot of small engines and use mine all the time.

 

[1994]

yes its an auto. i unpluggied the mass air flow sensor and it didnt do it at all so does that mean the mass air flow is bad?

 

[1994]

anyone?