My Trucks

[Cwheeler]

Havent been around for awhile anyway this is what ive been up too


Finished my 4x4, 87 Ranger fullsize axles D44 and 9", on 35-14.50 Boggers, 2.3L turbodiesel engine. still needs a few things like paint, rear bumper and Im rebuilding the winch 8724

annnnd I picked up this little truck recently, not sure what im gonna do with it yet but for what it is and the price I had to have it

 

[Iron Ranger]

A turbo diesel, that's a neat one. And now you got a 5.0 ranger and you don't know what to do with it!?

I know what I'd do with it........................................ take it out and see what she can do.

 

[Cwheeler]

I know what I'd do with it........................................ take it out and see what she can do

Oh I know what it can do, if I can keep it running the thing hauls.... but its got an EFI issue thats driving me nuts serging idle and if I rev it it wont go back to idle it just dies which makes it a pain to drive I havent played with it too much but if anyones got any ideas...

 

[dogboy]

Idle Air Control valve (IAC)?
I know that can cause a kind of erratic/ serging idle, and can also kill the motor.
I would at least look into it.

I like the trucks though, they're both unique!

 

[Iron Ranger]

but if anyones got any ideas...

Looks like you don't have a MAF(Mass Air Flow) sensor on your intake tube. It's needed in EFI to measure everything that's causing your problems.


This is what you're missing(Yellow arrow, OKIETHERANGER's engine). Without it, the engine won't know what to do and it causes your problems

See?

 

[dogboy]

Hmm, I didn't even see that!

I would look into that LONG before the AIC valve. If I disconnect the MAF sensor on my Ranger (4.0L) it runs REALLY rich, and kinda sputters.

 

[Cwheeler]

its pre 89 speed density, doesnt use a MAF, they went to a maf setup after 89

 

[Iron Ranger]

its pre 89 speed density, doesnt use a MAF, they went to a maf setup after 89

Huh, Really? I thought EFI mustang motors were MAF. I thought it was missing the MAF because the throttle body doesn't look like one used for speed density.


If that's the case, then yes, check the IAC, vacuum lines, fuel sensors, distributor, anything associated with fuel regulation and timing.


What's the donor vehicle the 302 came from?

 

[Cwheeler]

came from an 88 mustang

 

[Slim]

its pre 89 speed density, doesnt use a MAF, they went to a maf setup after 89

No, Ford started using a MAF sensor in 5.0L Mustangs in 1989. Exception was the California cars, which started in 1988.

The SD cars were notorious for having a hunting/surging idle. Clean the IAC and check your vacuum lines. Ford (SVO, SVT, FRPP etc) and aftermarket companies actually produced a small plate that sandwiched between the EGR plate and the IAC valve to effectively bypass the IAC. In some cases it helped, in other cases it made things worse (depends on who was turning the screws).

Might also be a good idea to spray some type of fluid cleaner (SeaFoam FTW!) through to clean up inside the engine (induction tract).

Last suggestion is to disconnect the battery for a short period of time to allow the KAM in the EEC to clear. The engine may or may not run better after this.

Good luck and nice trucks!

 

[igiveup]

Hello

Just out of curiosity does your ecm match your motor type? H.O. motors dont like speed density ecms. The firing order confuses the ecm.

igiveup

 

[Slim]

Hello

Just out of curiosity does your ecm match your motor type? H.O. motors dont like speed density ecms. The firing order confuses the ecm.

igiveup

Speed density-managed engines came in both HO and non-HO firing orders. AFAIK Mustangs had the HO and trucks got the non-HO. As long as the cam and EEC firing orders match then it's all good. The HO engine had hydraulic lifters, easily noted by the guides (aka "spiders") that help keep them from rotating. The non-HO motors did not have these guides. Easy enough to check by removing the upper and lower intake manifolds. If you mix up a HO and non-HO cam/EEC the engine won't stay running - from what i've experienced it won't even start - so I doubt this is the problem.


To the OP - one other thing I forgot to mention ..... if the engine has a cam in it (meaning something more than stock) then it can be a problem for the EEC, since it's SD. Might wanna keep that in mind. Small cams can be dealt with, but the bigger the cam the worse the problem.

 

[93Ranger4x4]

Try cleaning or even unpluging your egr. As for it being speed density, i was told you really can't do too much to them, they dont have maf's to sense new items IE intake, cam etc., so it will not compensate for more fuel or air the motor is getting, you could also check the tps sensor on top of the TB. I notice it has an aftermarket TB on it, that could be screwing it up somehow and yes the SD cars have a wierd idle(my 87 and my buddies 88 do the same, jumps up and down with the idle almost to the point of sounding like its going to die.) if you want to Mass air convert it, its not too hard, you can get a granitelli PIN kit for 90 bucks through jegs, get a cheap maf from a JY or e-bay, and also get a A9L comp from e-bay or fork out the extra and get a new computer. I forked out the extra cash and got a ford racing cobra r spec'd comp from summit racing for 300 bucks. Cool looking trucks!

 

[michiranger]

most of the time idle problems are caused by the iac...