|12-05-2013 04:46 PM|
|quicksand97||Well that sounds good to me, a couple more miles per gallon, and yes I am a person that can feel 1/2 a HP gain in my little 4 banger. Man wish I had some extra money right now to try some injectors. I just spent a few bucks on all new complete brakes, new exhaust manifold, and a complete new distributor. Now that I got my jeep running like a fine tuned clock I need to save for some new meats. Its amazing how it cost just to keep what you got running. Ah man just had a brain thought, I need money for gas.|
|12-05-2013 08:04 AM|
I did the injector, 4.0 throttle body and electric fan set up. I got very marginal hp gains but did gain around 2 mpg. With the mpg gains i have about paid for 2 of the upgrades already, maybe by the spring I will be able to say all 3.
Don't do them if you are expecting some beast to be awoken in the 2.5, the only thing I've really noticed power wise is that I don't have to downshift as much when going up hills.
With all that said when I bought my injectors I bought them from a v8 mustang, my jeep only needed 4 so I still have 4 for sale if anyone is interested?
|12-04-2013 01:06 AM|
|quicksand97||Are those 4 pental or single hole injectors. I myself have thought about installing 4 hole injectors, but not sure if it will be worse or better on MPG. Man its hard to gain Power and MPG at same time.|
|12-03-2013 02:50 PM|
|12-02-2013 09:30 PM|
|quicksand97||I just recently swap out my accel coil which is rated at 42,000 volts. I installed new coil by CRT performance which is rated at 45,000 volts. Changed out my accel wires to new ones and also installed new cap and rotor. Gapped my NGKs to a moderate .039. Some say its equal to a good tune up and the gains you feel is what you slowly lost through wear and tear. I believe this is true and also believe power gains can be achieved by a hotter spark and a bigger gap which also increases MPG. Feels real good and very responsive with quicker starts. Faster take offs and reaching and holding higher RPMs for a longer duration due to the coils turn ratios and secondary volts. You gotta make sure you are igniting all that added cold air/ intake along with that bigger throttle body. AIR / FUEL / SPARK !!!|
|12-02-2013 07:39 PM|
|Michigan jeeper||About how much is it for the Bosch 19lb injectors? And with all that done have you noticed better fuel mileage? I know I know it's a jeep and it's never gonna get good mileage but just curious|
|12-02-2013 05:52 PM|
I did an airraid spacer on my 99 4.0 tj (all stock) and it definitely woke things up.
We recently started a 95 2.5 YJ project, did 4.0 tb, Cat delete with FM 44, E fan and Bosch injectors. Did them one at a time and each helped. The start to finish is an amazing difference. Last we installed an Airraid spacer I found here for 25 bucks, Not sure BC all we had done helped so much! Hope this helps.
|12-02-2013 05:05 PM|
|quicksand97||Well there has been a long debate on spacers work or they do not ? I would have to say the debate is 50/50. As for me I believe they work. If they did not work how could a bigger throttle body work. Your playing with air, or lets say altering air. The amount coming in or the force it comes in, cooler air is better, all that. Yes there is no fuel injected at the throttle body, there is air and of course you are altering air. More air, cooler air, faster air/charge, the speed and force the air is intering manifold. On the basic side of things why do longer runners on intake manifolds create more torque. And yes torque equals horse power. Bottom line, my opinion colder intakes is good, allowing more air in to engine, bigger throttle bodys also allowing more air to enter intake manifold. Also throttle body spacers is like running longer intake runners creating more torque. Now do I think that a screw design on the inner walls of a throttle body is gonna do some magical spinning in a horizontal direction is gonna do much ? I have to say not really. Just like electricity, air like to take the path of least resistants. So I say go for it, you will be suprised what your 4 banger power plant is capable of. Thats once you find your sweet spot. And remember not one mod is gonna work miracles, they all have to work together, right ?|
|12-02-2013 12:42 PM|
|Yeahbuddy||You should bore the intake out to match the 4.0 tb opening also for best results. It pretty easy to do once you get started. I hear the tb spacer is useless, let me know how that one works for ya. The 19lb injectors have 4 holes the gas sprays from rather than just one. Giving better atomization of the fuel. Some say they deliver slightly more fuel also. Well worth the upgrades doing these mods and others IMO!!|
|12-02-2013 12:24 PM|
|Michigan jeeper||I plan to put a 4.0 tb on my 2.5 and am thinking about a tb spacer would I use a 2.5 tb spacer or a 4.0 spacer? Also have read about injectors what's the pros and cons on those?|
|11-12-2013 05:40 PM|
|quicksand97||O yea thats right it was a inertia ring which is better for crawling, your right. It was for keeping the engine and RPM from bogging down at crawl speeds or something like that. Keep us posted if you get one installed.|
|11-12-2013 05:35 PM|
|11-12-2013 01:19 PM|
|countryboynance||Well no high idle now after warming up! it idles up to 13-1400 when you first crank it but, then it drops down to 1000 or a hair lower! I'm guessing that's either normal, a very small vacuum leak, or the IAC ready for retirement! Either way I'm happy no more exhaust ticking & no more stopping at a stop sign & trying to take off with it idling at 2-2500 RPM's, so I'm happy!!|
|11-12-2013 07:34 AM|
|crtaylor||will find out very soon how the inertia ring works|
|11-12-2013 06:39 AM|
|11-12-2013 12:47 AM|
|11-12-2013 12:21 AM|
You guys ever thought about adding weight to the flywheel?
Adding Flywheel Mass for Engine Torque
|11-12-2013 12:07 AM|
|11-11-2013 11:18 PM|
|countryboynance||Haha, thanks man, well I got the intake/exhaust gasket in this evening and no leaks! after it gets hot and I cut it off and crank it up it still idles up to about 1500 for a second I'll know for sure tomorrow when I go to work cause usually when I slow down and press the clutch in it'll jump up to about 2k-2500 RPM's! Kinda thinking it's time for an IAC but, I'll see! I want to do some of the other 2.5 mods but, they will come in time! I enjoy tinkering on my YJ though my mom and girlfriend complain sometimes & sometimes I just don't feel like it as I work 5-6 days a week as a mechanic so, sometimes you just want a break! lol|
|11-11-2013 07:42 PM|
|11-11-2013 02:03 PM|
|countryboynance||Well I swapped my IAC housing the day after I did the TB swap but, no luck fixing the high idle, turns out main problem (intake manifold leak)! Also, I know this isn't the proper way but, if you need a TB gasket and can't find one close by you and your Jeep is your DD like mine, I just used gray RTV (any color will be fine but, I get gray for free at work lol) on the TB and IAC housing with no leaks but, it's a little tough to get off once it dries cause I had to take my TB back off to get one of the torx on the IAC housing that was trying to strip! Also, I believe it's a T-25 tamper proof torx if anyone wants or needs the size! Didn't bore mine but, may do so today!|
|11-11-2013 10:23 AM|
Yeap....save the clutch too…..bought my 3rd Wrangler with 35” tires…what a joke going down the HWY in 3rd gear… or 4th floored if there was tail wind.
I've tried most of the mods but at the end of the trail it's a 4 banger...
|11-10-2013 09:09 PM|
|11-10-2013 06:29 PM|
|99 GOLD TJ||Ok good to know! I also plan on putting on a header and fall exhaust plus the 19 lbs injectors. Should I do all that first then restart it or one step at a time and crank it? Just want to make sure it's all done right and still runs the same until I put the power to it.|
|11-10-2013 04:01 AM|
|quicksand97||Just make sure you swap out your sensors and use your existing ones. There is one sensor that is called the idle air control. It has 2 screws to sensor and 4 screws to the housing that holds the housing to throttle body. Its that housing you need to take off the 4.0L and put your 2.5L housing on the 4.0L throttle body. They are actually labeled 4.0L and your existing one is labeled 2.5L, of course. So bottom line you need the 2.5L housing on the 4.0L throttle body, along with all your 2.5L sensors. The housing does have tamper proof torx screws on it. You can pickup a small set at most auto parts store. Be sure to disconnect your batteries negative cable while you doing the swap. After you all done, hook your battery back and let your rig sit there and idle for about 10 to 15 minutes so that your pcm starts learning new air/fuel ratios. It will idle high at first start up, dont panic. Your RPMs will settle down after a few minutes and sould idle back to normal.|
|11-10-2013 12:14 AM|
|99 GOLD TJ||Dumb question I'm sure but what do you mean swapping the housing out. I bought my TB of eBay and when I get home from being off shore I have a whole but of simple upgrades to do to it. Just trying to get figured out what all it might or going to take to swap out throttle bodies.|
|11-09-2013 05:31 PM|
|quicksand97||I hope its not a bad throttle body, I have another 4.0L throttle body on the back self in storage all wrapped up and I labeled it ( REVS TO HIGH). Till this day I still wonder why it revs to high, maybe a hair line crack who knows. I do have another that is currently on my rig, working fine. I remember when trying the high reving one I change the map sensor, Throttle position sensor. I also checked and changed out the throttle plate to see if it was shutting all the way and still not good. Not trying to make you feel bad. I dont know how much you paid for the one you have, but you just might have to get another. I wish you the best. Keep us posted.|
|11-09-2013 01:27 PM|
Is the gasket on the AIC housing in good shape?
|11-09-2013 11:47 AM|
|OhioLugg||I swapped Tb and IAC housing, New IAC, no vac leaks, Still wants to 2000+ on startup and extended at times. Anyone have additional ideas for high idle?? Its really too hi for a high mileage engine cold. ( esp in Ohio !)|
|11-08-2013 08:19 PM|
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