slight acceleration issue

Matts ford · #1 08-16-2008, 10:08 PM

alright, i was driving my 93 f150 5.0 auto to subway on a 35mph road. i was behind someone doing the same speed as me but then i noticed whenever i let off the throttle my truck would still start to gain speed until i slowed down and snapped the throttle real quick. this is the third time this has happened this year. when i bought the truck the throttle would sometimes stick so i sprayed thrust on it. it fixed it for the time i dont know if i need to spray it again. i changed my iac and tps in january when i did my motor. i cleaned the tb and iac and all the ports and etc. last week. do you guys think its the throttle sticking again?

benmon · #2 08-17-2008, 09:29 PM

Mass air or speed density?

If SD, then you could have a vacuum leak. A vacuum leak with SD is like opening the throttle.

Matts ford · #3 08-17-2008, 11:17 PM

Quote:

Originally Posted by benmon

Mass air or speed density?

If SD, then you could have a vacuum leak. A vacuum leak with SD is like opening the throttle.

sd. i dont here any vacuum leak but i'll check it out tomorrow. but every time its happened, i happened to let off the throttle slowly or i was barely touching it from the get go. and wouldnt a vacuum leak do it all the time instead of being intermittent? and everytime its done it, all i did was snap the throttle and its like normal again.

Matts ford · #4 08-18-2008, 07:56 PM

no vacuum leak, no intake leak, no leak what so ever. i just sprayed more thrust on it again and i'll just see what happens. if it happens again i'll ask again. but thanks for now.

ymeski · #5 08-31-2008, 07:03 AM

Start by cleaning any & all pivot & Friction points of moving parts and up into both ends of the cable housing where the wire enters, with someone repeatedly operating the throttle's full range of motion w/a non residue spray cleaner (like Contact cleaner or the grease won't adhere). Then spray some white lithium grease (yep, u can get it in spray form) into the workings,every movement joint of throttle spring return Mechanisms also up into both ends of the cable housing. Also, watch for binding w/ the Cruise Control cable (clean & lub it too). Do you have Cruise Control?