Hesitating

[*broncoXLT]

Hi all!

I hope you guys can help me. I have an 88 Fullsize with a new crate motor. It is EFI. Its been in there for about a year and a half. Last December, I put a new MAP sensor in to fix the stalling and idling issues. My problem now is that it hesitates pretty bad on take off and up around 2000 rpm. After that, it seems normal. No codes are coming up and I'm just lost. The air filter is fine and I've replaced the fuel filter. Any help or a direction to go in would be awesome! /emoticons/[email protected] 2x" width="20" height="20" />

Thanks!

Adrienne

~~~~~~~~

88' 351 True Duel

Little Girl...Big Bronco

 

[Seabronc]

Have you tried running some injector cleaner and checking the fuel filter?

Good luck,

>-

 

[*broncoXLT]

Yes. It definetly runs better with the cleaner in it. I put the new fuel filter on about a month ago. The old one was really bad.

 

[Seabronc]

From the sound of it, it is a fuel supply problem. It is a little annoying to people around you, but a can of Seafoam might be in order. It makes a lot of smoke while it is doing it's thing but it does a good job of cleaning the system out. There is a lot of information about using it on the net, I have used it and I know a lot of other people have. It can be put in the gas for the injectors and also sucked into the intake, just follow the directions on the can. If that doesn't clear it up, then you need to start looking at other things that effect the fuel / air mixture.

Good luck,

>-

 

[miesk5]

yo!

If the above doesn't help much then this will take quite a lot of basic troubleshooting to get down to the problem;

Some of the basic TS info;

Self Test - Diagnostic Trouble Codes (DTCs) NO CODES Troubleshooting; BTW, The engine temperature must be greater than 50

 

[Seabronc]

Yes. It definetly runs better with the cleaner in it. I put the new fuel filter on about a month ago. The old one was really bad.

Also, on that comment, you may have crap in the tank that is clogging the system. Check the new one and see what the condition is.

>-

 

[*broncoXLT]

Thank you!

I'll let you know how it all goes /emoticons/[email protected] 2x" width="20" height="20" />

 

[jehusafat]

hey also check mass air flow sensor or the throttle position sensor both are around 20 bucks i believe from your local parts store

 

[*broncoXLT]

Whats the best way to check those?

 

[Sidescrollin]

get a programmer or take it somewhere to see if its running rich or lean to give you some more info on whats up with the fuel system.