EFI Tech and removing "Unecessary" Components

[SteveG]

Quality of work (good or bad) has nothing to do with why your post was merged into this thread. One of the goals here is to keep information consolidated so that, hopefully, the Tech section will become a decent resource and not just a pile of duplicate threads.

I'm also not suggesting you pay someone to do the work for you. Again, the post was only moved here to consolidate.

[philofab]

You can remove the EGR, evap solenoids, and air injection and it will still run. However it won't run as good as stock unless you spend some time reprogramming the ECM with different calibrations.

The "EGR" delete kit is just a resistor that tricks the ECM into believing the EGR is jammed shut so it doesn't attempt to use the calibrations for when exhaust is run through the intake.

In the long run it is cheaper to leave the stuff on, and you will need to understand the system extremely well in order to troubleshoot it, as most mechanics will not touch it once it has been modified extensively.

[jimmyd]

oh i understand (why i said i searched). just frustrated and tired, worked on this thing all weekend by myself 10 hours a day with just my 100pc craftsman set. i have dropped full engines in cars, never have i rebuilt one, so this is a learning experience for me. i just need to know what i can delete out of this crowded engine bay. i want to do headers and know the EGR won't work with anything aftermarket.

[jimmyd]

You can remove the EGR, evap solenoids, and air injection and it will still run. However it won't run as good as stock unless you spend some time reprogramming the ECM with different calibrations.

The "EGR" delete kit is just a resistor that tricks the ECM into believing the EGR is jammed shut so it doesn't attempt to use the calibrations for when exhaust is run through the intake.

In the long run it is cheaper to leave the stuff on, and you will need to understand the system extremely well in order to troubleshoot it, as most mechanics will not touch it once it has been modified extensively.

so I can't run a set of aftermarket headers, without having problems?

[hobbyturnedobsession]

Just run smog legal headers. Or, like me, when I got mine it had no egr bung so I took a piece of pipe with thread, ground it down to fit the #1 cylinder tube, drill a hole and weld the pipe on. Mine has worked for the past year and a half with no issues.

[philofab]

All the headers I've seen for the 89 and later 460s unique exhaust ports have the air tubes built in.

[Becks_Bronco]

I have a 95, 5.8. It just recently passed smog, but when i brought it home that day, i noticed something that looked like an evap canister, just behind the battery, wasn't connected to anything. Do the 92-96's still have a smog pump? And if i take it out, will it adversely effect engine performance in any way?

I'm assuming since it passed smog, either the technician ignored it, or it doesn't make much difference.

Also figured we could use this thread to discuss related topics. I'd like to remove everything that doesn't directly effect the engine running smoothly, from the engine bay.

[SteveG]

Do the 92-96's still have a smog pump? And if i take it out, will it adversely effect engine performance in any way?

As far as I can tell, they all have smog pumps all the way up to 96.

The ecm is programmed to operate with the air injection system functioning. You can remove it but you need to fool the ecm into thinking it's still there or reprogram the ecm to work without it. Personally, I don't see the gain unless you're going really extreme with the engine. Even then, you can make a ton of power with all original engine management equipment installed.

I'm assuming since it passed smog, either the technician ignored it, or it doesn't make much difference

I think you're referring to the canister and not the smog pump? Either he didn't notice it or he didn't care. Either one makes him sloppy but it worked out in your favor.

[philofab]

Canadian trucks had mass air earlier and had no smog pumps.

[Becks_Bronco]

Do the 92-96's still have a smog pump? And if i take it out, will it adversely effect engine performance in any way?

As far as I can tell, they all have smog pumps all the way up to 96.

The ecm is programmed to operate with the air injection system functioning. You can remove it but you need to fool the ecm into thinking it's still there or reprogram the ecm to work without it. Personally, I don't see the gain unless you're going really extreme with the engine. Even then, you can make a ton of power with all original engine management equipment installed.

I'm assuming since it passed smog, either the technician ignored it, or it doesn't make much difference

I think you're referring to the canister and not the smog pump? Either he didn't notice it or he didn't care. Either one makes him sloppy but it worked out in your favor.

Im a big fan of leaving things be. The factory engineers are much more knowledgeable than I. I was just wondering if since this stuff was already disconnected, if i would hurt it more by simply removing it.

I think he noticed, but passed it anyway. Seemed like a competent guy, but willing to overlook certain things.

[hobbyturnedobsession]

I bought mine with all the smog removed and it sucked. I spent alot of time putting it all back together correctly for it to pass legitimately. Definitely fix it. It will probably run better too.

[yikes]

Canadian trucks had mass air earlier and had no smog pumps.

Utah trucks didn't have smog either.

[fat dude]

Will running an after market cam, intake manifold, carb or throttle body, heads, ect. ect. Effect these efi components? Or do they require further calibration of some sort? Will it throw codes? Run to rich or to lean? Will it require a major reprogram of the ecu?

Thanks in advance GFB! New to the site but I'm hooked! Some great info and some beautiful rigs.

Jake

[hobbyturnedobsession]

I've heard tweeter (spelling?) Can do quite a bit but I believe that with heads an intake and Cam you would need yo have a mass air flow sensor. Mark Kruger brought his wife's by with heads and a Cam and some other add ons and it was harsh at an idle.

EDIT**** Stupid droid phone changed my spelling it was supposed to be tweecer and Keifer.

[BDKW1]

The speed densitiy's do not like modifications of any sort. Mass airs you can get away with a lot more. If you really want to go for a big motor with heads cam and all the goodies, an aftermarket computer is the only way to go. In the end it will be less time and hassle than tweeking a stock computer. BTDT.

[Phoenix0783]

I've heard tweeter (spelling?) Can do quite a bit but I believe that with heads an intake and Cam you would need yo have a mass air flow sensor. Mark Kruger brought his wife's by with heads and a Cam and some other add ons and it was harsh at an idle.

TwEECer.

You could probably get away with a mild cam and maybe an intake but not all 3. I've used the tweecer and it works great. Just get the RT one which lets you monitor stuff in real time, which is the only way to know how well your changes worked. There's big group of people that use the tweecer on eec-tuning.org

[RyanDS650X]

I really want to find a tuner in the phoenix area that can tune my Bronco. Id like to get a baseline dyno run with the stock computer and then with it tuned and see just how big of a difference it really makes. More of a curiosity of mine than a necessity really.

[philofab]

Quarterhorse is nicer than TwEECer

[Phoenix0783]

I've never used quarterhorse. What do you think makes it better? The interface for the tweecer software is awful.

[fat dude]

So what I'm gathering is, avoid Speed Density if upgrading cam, heads, intake manifold. In my search trying to gather more info, I'm getting confused as to what year FSB's have Speed Density and what years have MAF. I found some that say MAF is 95+. I read it is determined by the rear axle, pending on semi float or not and that is 93+. I also read where it depends on the GVWR. From what I gathered SD is an electronic shift control. If that's the case, is it as simple as finding one with the certain trans? Very confused...

On another note, has anyone done the MAF swap?

I am currently in the market for a FSB. So I'm trying to gather as much info as possible to point me in the direction best suitable for my needs. Weekend warrior, chase and pre-run, with some hp upgrades. I'll be doing all my own work, so trying to find a perfect platform to build off, motor and trans wise.

Thanks in advance! And sorry for veering this topic of course.

Jake