Topic: jet chip pros and cons

[stan98tj]

anyone have one of these jet chips installed on their 4 banger? here i am again in effort to squeeze out as much HP and maybe a few more mpgs from my jeep. does this thing really work-will i get a few more hps and mpgs from it? are there any dangers? im lookin at the stage 1 chip and i already have an AEM cold air intake, 62mm throttle body, TBS, and dynomax ultra flow cat back....all these mods have done a bit-not much in the range of HP increase and mpg increase...any opinions would be much appreciated.

[dexetr30]

I have one. IMO, it wasn't worth the money. My stage one hasn't really shown me any difference from stock.

[stan98tj]

yea i was wondering if it was too good to be true-figured for $250 it prob would be $250 spent on very minimal-if any-improvement...wonder if anyone has actually gotten positive results from this chip

[chardrc]

IIRC the general consinces is that the stag 1 chip wasn't worth it but the stage 2 gave a better response for the $$$..... but its been a good while since chips have been talked about

[jfrabat]

If you cross many rivers, keep in mind that the chip can cause some problems; a friend of mine had a stage 2 on his 6-cyl, and after crossing a river, the ECU went haywire as a result of the chip...  I dont use any chipes (none available for the 2.5L YJ), so I am only telling you what I was told and have no personal experience with this matter... 

[stan98tj]

stageII seems to want a new theromostat and for the jeep to burn 90octane....a bit pricey. maybe if this offered a good mpg improvement it may be worth it.

[jcsanders79]

I put a stage I on and saw an improvement that was worth the cost.  My guess is that the guys that didn't like it only had the chip not other mods.  For me it really pulled the CAI, header, TBS, 62mm TB, electric fan and mustang injectors together improving overall performance. 

[stan98tj]

and as for fuel efficiency which it is advertised to apparently improve....

[jcsanders79]

Coulnd't tell you, not a daily driver don't keep track of milage (not that it would be super acurate anyways).

[lax22]

I had one on my TJ, a stage one, and it was a waste. Once i started adding more mods it started going crazy and i eneded up taking it off. Gave it to a buddy and he loves it but his motor is stock. If you plan on adding engine mods just steer clear of them.

[JeffsJeep]

I had one on my TJ, a stage one, and it was a waste. Once i started adding more mods it started going crazy and i eneded up taking it off. Gave it to a buddy and he loves it but his motor is stock. If you plan on adding engine mods just steer clear of them.

I'm no expert by any means, but in the past on my other vehicles I modified, I would always disconnect the battery evertime I did a new mod.  This way the computer would relearn any new info it was recieving.  Did you do this?

[TahoeYJ]

Although I can't get any chip for my YJ, I've ran a JET chip in two of my previous '91 S-10 Blazers, grantd it was a Christmas gift I noticed a difference in power/mileage with it. I blew the motor in my first S series and hadn't sold the chip yet when I got a second one almost a year later, so I swapped the chip in first thing and noticed a difference. The improved throttle response was what I liked most of all.

We ran the Jet 6-pack in our old '89 TBI Chevy for towing, and it helped a little but always had a problem with pinging when we towed, so we would just run 91 while towing...

[lax22]

I'm no expert by any means, but in the past on my other vehicles I modified, I would always disconnect the battery evertime I did a new mod.  This way the computer would relearn any new info it was recieving.  Did you do this?

Yes I did when i first installed it and every time i added a new mod. After i added teh 4.0TB and intake tube the stage one jet chip didnt seem to like the increased air and was giving me running problems. Before adding all that it ran fine. my problem was afterward. The stage one is only for stock or slightly modified engines. When you start playing around with intake mods the stage one didnt like the change. Like i said my buddy runs it and loves it on his stock 2.5l.

[stan98tj]

in that case i really dont think its worth it for me. im runnin a 62mm TB, a tb spacer an AEM intake, and higher flowing exhaust-id need to go to stage II, but it seems with stage II ya need to run higher octane and it doesnt seem like you would get better mpg. more expensive gas for same or maybe less mpgs......not with the price of gas these days..i think ill pass.
thanks for all ur input guys!

[dexetr30]

Yes I did when i first installed it and every time i added a new mod. After i added teh 4.0TB and intake tube the stage one jet chip didnt seem to like the increased air and was giving me running problems. Before adding all that it ran fine. my problem was afterward. The stage one is only for stock or slightly modified engines. When you start playing around with intake mods the stage one didnt like the change. Like i said my buddy runs it and loves it on his stock 2.5l.

I thought that a 4.0 T.B. and intake tube was  only a slight engine mod. Seems to me like these kind of bolt on items are hardly any more than mild. A cam, shaved deck, ported head and valve job, headers and maybe some sort of forced induction would be more a modified engine to me.

 I have a 4.0L T.B. along with a 4.0L air tube with a k&N drop in. I think the 4.0L air tube flows much better than the stock 2.5L setup. I'm also running a set of MSD wires with a Scream'n Demon coil. These mods made a good difference as far as the butt dyno goes. If I remove my Jet Chip and run it through a few cycles to reset everything, I don't notice any difference in performance or gas mileage as compared to when it's installed. I'm not saying everyone has or will get the same results. Just relaying what I've found with my mild setup.