i know this aint a dodge but i have posted on a few ranger forums without any suscess. i have a 94 ford ranger 3.0 auto with 49k miles. here is the problem when u first take off in the morning it tries to bog on you real bad but after it warms up it goes away. it has a new fuel pump assemlby,pressure regulater,tps,full tune up,intake gaskets,mass air flow cleaned,fuel and air filters,and new cat and muffler. anybody have any ideas on wat it could be?

 

could it maybe be a clogged cat?

 

it has a new mangaflow cat with maybe 2000 miles on it

 

Check the ECT, IAT, and o2 sensor.

 

it has a new engine coolant temp sensor. it has two oxygens sensors and i had a friend of mine hook the truck to a snap on sanner and he said the o2 volt was switching back and forth like they should. if u unplug the mass air flow sensor when the truck is ruuning it dosent run any different. i always thought that the truck wouldnt idle if u unpluggied it? any suggetions would be nice.

 

Try a MAF from a JY. And did you check/replace the IAT/ Air Charge sensor?

 

no i havent is there anyway to check it?

 

You need a multimeter and a Haynes manual. The manual tells you how to check a lot of the sensors. This way you are not buying parts for nothing.

 

yea thats wat i have being doing for alot of the sensors. i just never crosed my mind to check the iat. i got this truck cheap and it had been sitting for awhile and everthing i mean everthing was orginal. so alot of the parts i replaced needed replacing. and 20 to 25 mpg is alot better then 12 lol

 

i cleanied the mass air flow again and i cleanied the iat because it had alot of black grit on it. and it runs alittle better but it still aint right.