4bangerjp.com
General Forums => The Mess Hall => Topic started by: jcsanders79 on July 25, 2006, 09:17:41 PM
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I just installed the Jet Performance Chip in my 97 TJ and it might be the best mod i've done yet. My off the line power is much better, the shift points have changed for the better and it only took five minutes to install. If you have a 97-03 TJ it might be the best $200 you spend.
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Does it say anywhere that you have to use premium gasoline, i have heard that atleast for the stage two chips you have to run 91 octane???
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As far as I know I don't (it runs fine with 87) but I only put the stage one chip on. I don't think that they make a stage two for the 2.5l.
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is it a hypertech???
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ohh wait n/m its a jet sorry, i'm almost positive they do i went wheel'n with a guy who had the 2.5l and he had a stage II he said it made a huge diff and he could actually do 80 on 33's with 3:73 gearing!!
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I would believe it. I was really impressed with the difference that the stage one chip made. I will be intallinga header and 4.88's soon and I can't wait to see the difference then.
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There is still a lot of room to play with in the stock tune. I'm assuming some of you may be experiencing better MPG also. The stock ECM idles in the low 14s and cruises at the same AFR, but when you go WOT there is a big rich spot [as in hits high 10s low 11s:1 afr] (I'm assuming where peak torque is). With such a conservative fuel curve i'd bet the timing curve is just as conservative...
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I ran a stage I before all the engine mods and really could tell a difference, and the stage II seemed like it made all the electrical, intake, and exhaust mods just come together. I couldn't believe the difference that a 3 minute install could do! Someone had asked about octane, I run reg unlead at 87.
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How much was the stage one chip and is the stage two worth the extra money, and do they make them for the 2.4l???
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I ran a stage I before all the engine mods and really could tell a difference, and the stage II seemed like it made all the electrical, intake, and exhaust mods just come together. I couldn't believe the difference that a 3 minute install could do! Someone had asked about octane, I run reg unlead at 87.
so, you run regular 87 octane with the stage 2? i was thinking of "chippin" but with gas prices so high it kinda deterred me from it. but if the stage 2 is running fine on the 87, then it seems to be worth it 100%!
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Do they make those chips for the 91-95 YJ 2.5's? I haven't seen any around, ever. Know they have them for 2.5's TJs and I think the later 2.4's
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Do they make those chips for the 91-95 YJ 2.5's? I haven't seen any around, ever. Know they have them for 2.5's TJs and I think the later 2.4's
I called JET, years ago... Our Jeeps have to OBD1 computers (or a number kinda close to that). It's not a learning computer. Everytime they tried to reprogram the computer with one of their performance chips, it kept going back to stock. It was weird, I thought they might do a custom one for me... days went by and they told me the bad news...
I hope that someone else has better news...
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Yes we have OBD1 ecus, OBD1 is simple in the world of ECUs. If someone had a program, im sure they could rechip the stock ecu just like most imports do (maybe domestics too)
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Talked to the Jet rep at the 4 wheel parts expo in Dallas. He said Stage 1 for regular 4 banger and Stage 2 for 4 bangers with a hotter cam.
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Talked to the Jet rep at the 4 wheel parts expo in Dallas. He said Stage 1 for regular 4 banger and Stage 2 for 4 bangers with a hotter cam.
But did he say what years??
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Just bought a used Stage 2 Jetchip :dance:. I thought it was used anyway, but the seal on the static bag is in tact :D! It didn't come w/ any instructions. I know it plugs into one of the ecu ports on the right rear firewall, but I'm not sure which one and I don't want to fry anything :? . Any help is greatly appreciated! Thanks!
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Just bought a used Stage 2 Jetchip :dance:. I thought it was used anyway, but the seal on the static bag is in tact :D! It didn't come w/ any instructions. I know it plugs into one of the ecu ports on the right rear firewall, but I'm not sure which one and I don't want to fry anything :? . Any help is greatly appreciated! Thanks!
Hey, what a coincidence, I just got the stage one off e-bay for $130. If you look under the hood on the passenger side there are three electrical ports, A white, gray, and black. It plugs right up to the black one. Takes all of two minutes, oh and don't forget to disconnect your negative terminal. I think you'll like the chip, I have the stage one, but what a difference. I really can feel a diference.Hope you like yours.
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I never even thought about "chipping" my Jeep, let alone there being any difference for a 4cyl. i think I'll be buying this shortly!! I struggle to keep it at 55 on the interstate right now w/ 4.56's and 36's!
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it's been awhile but i know performance products which is no owned by 4wd hardware advertised a jet stage one for yj 2.5. i never actually got one but I know it was there cause i thought about it plenty of times. the chips don't actually change programming in the ecu they just lie to it to make it send out different signals. it's like telling the ecu you are at a different atmosphere. so there should be no problems with programming. unless there is something different about jet
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Thanks Gomi! I appreciate it! I'm installing right now! BRB after install and test drive to report ! :weee:
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As far as I know I don't (it runs fine with 87) but I only put the stage one chip on. I don't think that they make a stage two for the 2.5l.
I just sold my Jet chip Stage 2 on my 02 TJ with a 2.5L for 80 bucks... Jet says that you should put 91 in because it will reduce the pinging sound you might get. Plus on a Stage 2 you will need a upgraded thermostat!
I believe the part number on the 97-02 2.5L is 90017S. Just FYI
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What thermo is needed? I installed the chip but I couldn't really test it out that much because my yellow check engine light came on :? . I drove it for a while, seemed to run really well, then i noticed the light. No problem before chip or after taking it out. Any body have any ideas? Thanks!
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Fan -Fricken- Tastic! Being somewhat tenetative without a manual, I had failed to seat the chip completely onto the receptacle, so contact was iffy at best. I noticed a small clip on the back of the chip that was about 1/8" away from what it was supposed to clip onto, and I really had to push HARD to get it to seat, but it finally did :D . These chips will not turn your 4-Banger into a V-8, but they will make your 4-Banger MUCH more fun to drive. BIG DIFFERENCE! :twisted:
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speaking of gas..... atlest at the kwik trip neer my house they charge the same amount for 87 as 89 (regular unleeded as med grade).. i found this out a few weekesago so now i aslways try to go there so i can get slitly beter gass for the same price..
i dont know if any other kwick trips do this but jsut a heads up
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What thermo is needed? I installed the chip but I couldn't really test it out that much because my yellow check engine light came on :? . I drove it for a while, seemed to run really well, then i noticed the light. No problem before chip or after taking it out. Any body have any ideas? Thanks!
Jet says that you should put a 180 degree thermo in, I believe! Go to www.jetchip.com and it should tell you everthing you need to know.
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Thanks Tommy! Already have a 180 in there. All is really well. Wasn't sure what that check engine light was, and the thermo mention got me thinking. But I just hadn't seated the chip all the way. It's GREAT now! Thanks again!
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ohh wait n/m its a jet sorry, i'm almost positive they do i went wheel'n with a guy who had the 2.5l and he had a stage II he said it made a huge diff and he could actually do 80 on 33's with 3:73 gearing!!
I am not sure what I have that added the most power and I am not even sure of how much power I have gained but I am able to sustain (until I have to go up hill) 85 MPH (and can get up to 95 but I don't like revving the Jeep that high for that long) in fourth gear on the interstate. Here is what I have: '97 TJ with 2.5" lift, Mickey Thompson Baja Claw 33" tires. I have the 2.5L with a Pacesetter header, straight pipe instead of the cat and a borla cat-back exhaust. I have the Jet stage I chip, K&N cone filter, and an MSD ignition box. That is all I can think of at the moment. I would definitely like to trade out my 4.11s for perhaps some 4.56s or even 4.88s. Maybe I would be able to drive on the interstate in 5th gear for once.