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Old 09-09-2012, 11:06 AM   #1
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4 cylinder no power, cam timing adv???

hello!!
i have 4 cylinder 2.4 liter wrangler and NO POWER.. i know i read on forum "4 banger has no power it's normal" but I cant really understand that..
- brick shape - suzuki grand vitara 2.5liter, toyota RAV4 2.0 liter and those cars similar brick shape, weight and doing 70mph with no problem.

found some info online that if advance cam timing engine respond better .

anybody tried this before???

i was thinking maybe engine in wrangler is setup for offroad and that's why it sucks on highways, if change cam timing and ignition timing maybe it would drivr better

what do you think??

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Old 09-09-2012, 11:18 AM   #2
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What size tires and which transmission are you running?

Timing-wise, the computer has complete control over the engine timing.

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Old 09-09-2012, 11:37 AM   #3
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Timing-wise, the computer has complete control over the engine timing.
I look forward, with much anticipation, to you explanation of complete (or incomplete) computer control of cam timing.
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Old 09-09-2012, 11:40 AM   #4
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2006 tj se everything stock, 6 speed manual and tires 215/75/15
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Old 09-09-2012, 11:40 AM   #5
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No power as in a skip maybe, all cylinders firing? Bad coil pack? I've gone thru 2 coil packs in the last 2 years on my 2.4.

If it's just lack of "balls" like climbing a hill on the highway - Welcome to owning a 4 banger. I'm running 33" with D30/35 & 4.10's, and Stock NV1500 tranny.

Aside from the awesome FPG (feet per gallon) mileage I get, highway driving sucks. Usually 60/65 max on a flat straightaway. 5th gear is a joke, no Idea why it's even there - maybe for a downhill run with a good tailwind. Climbing any grades on a highway usually drops the needle to 50 at best, with the pedal floored. I usually have to downshift before I get to the top!

Other than that, pretty normal for a 2.4! LOL
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Old 09-09-2012, 11:41 AM   #6
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I look forward, with much anticipation, to you explanation of complete (or incomplete) computer control of cam timing.
What, trying to pick an argument? I didn't say cam timing, I said "engine timing".
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Old 09-09-2012, 11:57 AM   #7
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No power as in a skip maybe, all cylinders firing? Bad coil pack? I've gone thru 2 coil packs in the last 2 years on my 2.4.

If it's just lack of "balls" like climbing a hill on the highway - Welcome to owning a 4 banger. I'm running 33" with D30/35 & 4.10's, and Stock NV1500 tranny.

Aside from the awesome FPG (feet per gallon) mileage I get, highway driving sucks. Usually 60/65 max on a flat straightaway. 5th gear is a joke, no Idea why it's even there - maybe for a downhill run with a good tailwind. Climbing any grades on a highway usually drops the needle to 50 at best, with the pedal floored. I usually have to downshift before I get to the top!

Other than that, pretty normal for a 2.4! LOL

most likely the second part , highway 60-65, facewind, climbing grades. It's difficult to leave like that(it's 4 banger nothing help) because i was owner of grand vitara 2.5(almost same hp and torque, weight, body shape ) and that car was really good on highway.

Jeep liberty is more aerodynamic shape(almost same as RAV4) but people with 2.4 engine have same issue, pathetic on highways. so... was wondering if any engine mods can help.
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Old 09-09-2012, 12:06 PM   #8
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Only one I can think of...........yank the 4 and drop in a 6!
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Old 09-09-2012, 12:15 PM   #9
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Only one I can think of...........yank the 4 and drop in a 6!
was thinking about it , my dream is diesel 6cylinder but... need to wait when dodge sprinter will be available low price..
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Old 09-09-2012, 02:01 PM   #10
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I didn't say cam timing, I said "engine timing".
Here is what you said:

Quote:
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Timing-wise, the computer has complete control over the engine timing.
And that's as wrong as the day is long. No two ways about it.
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Old 09-09-2012, 02:06 PM   #11
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Then we can agree to disagree.
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Old 09-09-2012, 03:21 PM   #12
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Lucky it's not a automatic. They are good in town and traffic.
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Old 09-09-2012, 03:33 PM   #13
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Auto or Stick, 4 or 6 cyl., we didn't by em' for the gas mileage or the speed! If ya want to get there fast drive a Porsche, If ya wanna get there no matter what, drive a Jeep!!!!!
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Old 09-09-2012, 04:20 PM   #14
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Auto or Stick, 4 or 6 cyl., we didn't by em' for the gas mileage or the speed! If ya want to get there fast drive a Porsche, If ya wanna get there no matter what, drive a Jeep!!!!!
agree jeep's not for speed, i like mine, winter drive everywhere, summer with no top is great, but compare to other similar SUVs it's pathetic on highway, really want to do something with that can't give up
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Old 09-09-2012, 04:24 PM   #15
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Did you not drive it before you bought it? Did you also test-drive other Wranglers with the 4.0L six cylinder engine for comparison?
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Old 09-09-2012, 04:51 PM   #16
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found some info online that if advance cam timing engine respond better .

anybody tried this before???

The cam timing is set internally. That motor is basically a Neon/PT Cruiser motor. I believe that you can set it up with SRT4 parts and make a little monster out of it. You could go to the Neon forum or the SRT4 forum to see about adjustable cam gears. But it will cost you both in cash and in bottom end torque.
Sounds like you need gears more than you need cam timing. Spinning the 4 is much more productive. If you have the stick and 4.10's with 31 or 33 tires then you need a re-gear to 4.88's at least.
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Old 09-09-2012, 05:01 PM   #17
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Did you not drive it before you bought it? Did you also test-drive other Wranglers with the 4.0L six cylinder engine for comparison?
i didn't drive before I bought it crashed for few $$, before i've had grand vitara 2.5 and car was great.
I didnt know that jeep with engine 2.4 is gonna drive like 1.8
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Old 09-09-2012, 05:07 PM   #18
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Keep in mind your Wrangler is MUCH heavier than a Vitara and its aerodynamics are that of a barn door. The Wrangler was designed for offroading and tolerable transportation but not much else.
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Old 09-09-2012, 05:10 PM   #19
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Sounds like you need gears more than you need cam timing. Spinning the 4 is much more productive. If you have the stick and 4.10's with 31 or 33 tires then you need a re-gear to 4.88's at least.
Bob
I have 6speed stick with 3.73 i belive, so.. re-gear is not gonna be the same as driving on 5th speed(i mean shifting till 5th gear only) ??? or those gears gives something that car drives better???
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Old 09-09-2012, 05:40 PM   #20
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So 5th gear is 1 to 1 x 3.73 = 3.73
6th is .84 x 3.73 = 3.13

With 4.88
5th gear at 1 to 1 x 4.88 = 4.88
6th gear .84 x 4.88 = 4.09
You see it is lower in 6th than you are now in 5th. More acceleration and speed.
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Old 11-23-2013, 08:59 AM   #21
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