New Guy, Idle problem

[88BroncoBlack]

I just bought an 88 351 4x4, everything runs great but if i sit at idle in gear for more than a minute or so, the engine will all of a sudden it will hickup a little and drop rpms and die, if you give it gas before it dies its fine, and after it dies, the engine has no problem firing right back up

 

[zach351]

my 89 did that to me a few weeks back i added some STP and idled it up just a tad and its doing great just not gettin enough fuel through the lines it sounds like.. is it doing anything else? any other problems that might could contribute to that

 

[zach351]

my 89 did that to me a few weeks back i added some STP and idled it up just a tad and its doing great just not gettin enough fuel through the lines it sounds like.. is it doing anything else? any other problems that might could contribute to that

 

[zach351]

btw WELCOME to the Zone man!!

 

[88BroncoBlack]

i know a decent amount about vehicles, i built a camaro awhile back, but just dont know about these broncos yet, i just didnt know if i was missing somethin, i dont know when maintanence was done last so i plan on fuel filter, air filter, plugs, oil, stuff like that, i just didnt know if there was somethin else that would be affectin the idle, electronically and such

 

[BroncoJoe19]

i know a decent amount about vehicles, i built a camaro awhile back, but just dont know about these broncos yet, i just didnt know if i was missing somethin, i dont know when maintanence was done last so i plan on fuel filter, air filter, plugs, oil, stuff like that, i just didnt know if there was somethin else that would be affectin the idle, electronically and such

Welcome to BroncoZone!

Please post in your sig file info about your rig such as year, engine, carb or EFI and any mods etc. so that we can be more specific in helping you.

For example I don't know if you have a carb, or EFI. The response would be greatly different.

In the mean time, I would give her a tuneup, or at least take a look at the tuneup parts and decide if they need replacing.

Then fill in your sig file with the vehicle information. Yes there are electronic components that can affect idle, and ways to check for them, but it does vary from year to year.

You also should check for codes.. if you don't know how, we will walk you through it.

 

[Shadow_D]

^ X2

to the Zone!

 

[88BroncoBlack]

where do i go to add a sig, didnt see it in my options, only saw personal statement

 

[BroncoJoe19]

where do i go to add a sig, didnt see it in my options, only saw personal statement

My controls>>> Personal Profile... Edit signature

that should do it /emoticons/[email protected] 2x" width="20" height="20" />

 

[88BroncoBlack]

hey guys i plan on a complete tuneup to get her goin, how do i pull codes to check my fuel and ignition electronics, EGR MAP TPS, anything i can check for

 

[Shadow_D]

There ya go /emoticons/[email protected] 2x" width="20" height="20" />

 

[BroncoJoe19]

hey guys i plan on a complete tuneup to get her goin, how do i pull codes to check my fuel and ignition electronics, EGR MAP TPS, anything i can check for

Here you go...

If you don't have acrobat reader installed on your computer you can get the reader for free at www.adobe.com

http://www.fordfuelinjection.com/files/self_test.pdf

 

[88BroncoBlack]

ive noticed so far im only getting like 7-8 mpg

 

[BroncoJoe19]

ive noticed so far im only getting like 7-8 mpg

Ouch! ! !

Yep... that's where I was when I first got mine, well I was at 6-7mpg

A tuneup made a huge difference, brought me up to 11.

Both my plugs and air filter looked like they were original equipment.

Just yesterday, I replaced my TPS, and cleaned the throttle body and we have come to the realization that our truck NEVER ran as she should have. I guess (hope) that I am now with the rest of guys who have well maintained trucks, 12 city 14 - 15 highway.

joe

 

[88BroncoBlack]

Ok guys, went shoppin tonight, do you think this will fix my problem and get me back in shape

NEW cap, rotor, wires and plugs - fuel, oil and air filters - o2 sensor and oil change

if you guys can think of anything else let me know please

thanks

 

[shift1313]

it is possible you have some dirty injectors. its a little bit of a long job but cheap parts to replace and clean the injectors. You should be able to trigger then with a 9v battery and spray some cleaner through them. id say its possible there is some build up and around idle you have a leaky injector or 3 causing your problem. it could be so many things really. Your idle air control valve could be okay but slow and or sticky. it could even be emissions related like your egr valve. I had mine causing some interesting problems.

last but not least to add would be TB gasket. Ive seen them get sucks in a bit so they leak(not noticable from the outside). again a few $$$ but would be worth it in my mind.

welcome

 

[BroncoJoe19]

Yep Like Shift1313 said it could be all of those things, or a little bit of a few of them.

Could be the MAP sensor.

But unless you just want to change a bunch of parts so that you know they are new, then pull codes and see where it leads you.

Have fun!

joe