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Old 08-24-2011, 03:43 PM   #1
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First Wrangler (94) and time to add to it

Hi, just bought my first Wrangler. It was a fallback option after numerous deals fell through from crappy Craigslist sellers. Anyway, it's a 94, 6 inch lift, 4 cyl. It drives well although passing people on the freeway is an all day event. I already took it to my mechanic to do a run through and he says everything is good to go. The engine was completely redone not too long ago and the whole thing barely has over 100k miles on it.

I've been referred to Quadratec for parts and I'm liking their selection. However, since I'm new to this type of vehicle I had some questions about whether or not these parts I'm thinking of getting are over-priced, needed in the first place or if they do anything in general.

First off, horsepower on a lifted 4cyl is hooooorrible so I'm looking at getting a little boost if possible.

I'm thinking aftermarket air intake and I'm wondering if there is much of a difference between these two in terms of performance:
AIRAID 310-176 - AIRAID® Cold Air Dam Intake for 91-95 Jeep® Wrangler YJ with 2.5L I4 Engine - Quadratec
Rock-It Parts Max-Flow Intake System for 91-95 Jeep® Wrangler YJ with 2.5L I-4 Engine - Quadratec

Also, would this be necessary when adding a new air intake:
K&N 33-2046 - K&N Replacement Air Filter for 87-95 Jeep® Wrangler YJ with 2.5L I-4 & 4.0L I-6 Engines & 1986 Jeep® Cherokee XJ with 2.5L I-4 Engine - Quadratec

I've also heard about Kat-back systems being good for a little performance boost but I've also heard they're nothing special so is this a good deal:
Pacesetter 86-2872 - TFX Performance Kat-Back System for 87-95 Jeep® Wrangler YJ - Quadratec

And finally, for the performance end, do throttle body spaces actually do anything:
Hesco 40TBS - Hesco 60MM Throttle Body Spacer for 91-06 Jeep® Wrangler YJ & TJ with 2.5L and 4.0L - Quadratec

I was looking at spark plug/ignition wiring replacement as well:
E-3 Spark Plugs E3.58 - E-3 Diamond Fire Spark Plug for Chrysler, Dodge & Jeep® Vehicles - Quadratec
Accel 5133R - Accel 8mm SuperStock Spiral Wire Sets for 91-01 Jeep® Wrangler YJ & TJ with 2.5L 4 Cylinder - Quadratec

What about coolant hoses:
Samco XDB TCS-460/C - Samco XDB Silicone Coolant Hoses for 87-95 Jeep® Wrangler YJ with 2.5L Engine - Quadratec

Are these seats quality for the money or should I look for something cheaper (both front seats do need replacement):
Smittybilt 44911 - Smittybilt Standard Bucket Seat for 76-06 Jeep® CJ, Wrangler YJ, TJ & TJ Unlimited - Quadratec

Finally, locking glove boxes or somewhere to put my phone if I hop out to go hiking for a bit:
Tuffy 036-01 - Tuffy Secure Glove Box Safe in Black for 87-95 Jeep® Wrangler YJ - Quadratec


Yep, a lot of links and a lot of questions. I'm just trying to figure out the best performance I can get for the buck as well as make sure I don't overpay for things I don't need or for things I can find a lot cheaper elsewhere. I'm used to 4x4 Tacoma's so the whole jeep thing is still new to me.

I'll get pictures up soon as well.

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Old 08-24-2011, 05:02 PM   #2
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Nice list, don't forget the Banks Torque Tube header. As far as speed and horse power you have the wrong engine. I know, I have the same engine. I got to tell you, it's great for putting around and good for off-road fun. But for passing on the freewayyou're stuck in the right lane. Have you considered regearing? You probly have 4.10:1, taking it to 4.56s or 4.88s may help you out. What size tires do you have?

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Old 08-24-2011, 05:39 PM   #3
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Originally Posted by yj93ben View Post
Nice list, don't forget the Banks Torque Tube header. As far as speed and horse power you have the wrong engine. I know, I have the same engine. I got to tell you, it's great for putting around and good for off-road fun. But for passing on the freewayyou're stuck in the right lane. Have you considered regearing? You probly have 4.10:1, taking it to 4.56s or 4.88s may help you out. What size tires do you have?
^ X2 on the re-gearing the rest you listed will give you minimal gains, and might not be noticeable......
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Old 08-25-2011, 03:32 PM   #4
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Old 08-25-2011, 03:35 PM   #5
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Originally Posted by yj93ben View Post
Nice list, don't forget the Banks Torque Tube header. As far as speed and horse power you have the wrong engine. I know, I have the same engine. I got to tell you, it's great for putting around and good for off-road fun. But for passing on the freewayyou're stuck in the right lane. Have you considered regearing? You probly have 4.10:1, taking it to 4.56s or 4.88s may help you out. What size tires do you have?
Do you have a link for the specific header you're talking about? I see the Pacesetter brand on Quadratec.

Yeah, I know the engine is crap for highway speeds. I'm not too worried about it. I was just hoping that a couple hundred bucks could net me some small gains in 4th gear so I can at least get on the highway without backing traffic up. I'm thinking maybe just go with the air intake.

I know the gears were redone when the last owner went through the engine. I don't honestly know what they were changed to though so I'll have to find out.
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Old 08-25-2011, 03:36 PM   #6
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^ X2 on the re-gearing the rest you listed will give you minimal gains, and might not be noticeable......
Nooooooooooo.

Well, at least I can spend some money on new seats.


Speaking of which, are those seats I linked in the first post the best deal or does anyone know of comparable seats for a cheaper price?
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Old 08-25-2011, 04:47 PM   #7
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Do you have a link for the specific header you're talking about? I see the Pacesetter brand on Quadratec.

Yeah, I know the engine is crap for highway speeds. I'm not too worried about it. I was just hoping that a couple hundred bucks could net me some small gains in 4th gear so I can at least get on the highway without backing traffic up. I'm thinking maybe just go with the air intake.

I know the gears were redone when the last owner went through the engine. I don't honestly know what they were changed to though so I'll have to find out.
I'm not advocating Quadratac, but here's a link;

Gale Banks Engineering 51316 - Banks TorqueTubes® Exhaust Manifold Assembly for 91-02 Jeep® Wrangler YJ & TJ with 2.5L I-4 Gasoline Engine - Quadratec
Banks Power | 91-11 Jeep - 4.0L, 3.8L & 2.5L>>TorqueTubes® Exhaust Manifold Assy, 2.5L

If you shop around you should be able to be their price.

These are some great seats. I also got the rear seat to match;

bestop-product

Get anal about shopping online, a lot of places price match. Have fun.
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Old 09-01-2011, 10:04 PM   #8
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I'm not advocating Quadratac, but here's a link;

Gale Banks Engineering 51316 - Banks TorqueTubes® Exhaust Manifold Assembly for 91-02 Jeep® Wrangler YJ & TJ with 2.5L I-4 Gasoline Engine - Quadratec
Banks Power | 91-11 Jeep - 4.0L, 3.8L & 2.5L>>TorqueTubes® Exhaust Manifold Assy, 2.5L

If you shop around you should be able to be their price.

These are some great seats. I also got the rear seat to match;

bestop-product

Get anal about shopping online, a lot of places price match. Have fun.

Thanks for the links. I've been out of town but now I'm shopping around to find the best price.


In anyone's opinion, is it even worth it to get the "performance" parts for a 4cyl or is it not going to be noticeable? And if I had to pick one part, which would probably give the biggest gain? I'm guessing it would be the air intake. So far I'm just looking at the seats, possibly the exhaust manifold and some heavy duty door latches.
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Old 09-01-2011, 11:34 PM   #9
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Amazon has seats for 49 bucks a piece shipped! have 2 of them they say there on ba k order but placed my order and they shipped a week later
Amazon.com: Smittybilt 44901 Black Standard Bucket Front Seat: Automotive
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Old 09-02-2011, 11:49 AM   #10
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Nice Jeep. I think you'll like it. I just got my first Wrangler back in March. A '93 4 cyl, 5 speed. Don't listen to the nay-sayers. The 4 banger can certainly be made "adequate" and then some. With just a little expense and some time 5th gear at 50 mph is pretty normal now in mine and I can actually pass slower vehicles / farm equipment / bicyclists . I'm running 245/75-16's, which equates to about 31". You have to remember that just about any 4 cylinder engine will require down-shifting on the steeper hills and the Jeep 2.5 is no exception. At least now though, I can maintain or even gain speed on inclines when running above 50 - 60 mph.
If you want to run bigger diameter tires then I'd think re-gearing, in addition to engine mods, would be the way to go.
I'm not going to pay to dyno a 4 cylinder, but my buttometer tells me I've probably gained around 15 hp and, more importantly, more torque earlier in the curve. Anyway here's what I've done so far and am quite pleased :
I had the catalytic converter replaced by the dealer as it was under recall (you can find out if yours is affected here: https://www.jeep.com//hostb/crossbrand/owners/en/
I ugraded the fuel injectors to the "4 hole" design. Found on ebay for $65:
JEEP CHEROKEE 91 92 93 94 95 FUEL INJECTORS 2.5 UPGRADE | eBay Do a search on "fuel injector upgrade".
I found a used 4 liter throttle body on ebay for $15 and performed the throttle body swap that is referenced many times on just about any Jeep forum. Search "throttle body swap"
Rather than going with K&N I just opened up the air box. I also removed the restrictor that lives in the tube between the air box and the throttle body.
Lastly, I installed a Magnaflow muffler and Dynomax tailpipe.
One thing I learned as I went along is that while Quadratec, Jeep4x4 and other websites are slick and easy to browse they charge for that. Don't be afraid to give websites like rockauto a try.
Make sure all regular wear items such as plugs, wires, cap, rotor, cooling system, clutch system, and fluids are in good shape. Also make sure all sensors are functioning properly and that your entire vacuum system is intact with no leaks.
If you don't learn what J.E.E.P. stands for you're probably not doing it right.
I'm no expert and I give credit for my results to others who have posted advice here. Searching pays off.
Good luck and enjoy
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It's for looks, I don't trash it.
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Old 09-03-2011, 12:10 AM   #11
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^^^^^

Your advice is well timed.

My jeep already broke down. Maybe I bought a lemon. It died while in first gear and then wouldn't start. I was late for an indoor soccer game so I left it where it was and got a ride. Afterwards, I came back, it started up and then died in 2nd gear down the road. I'm thinking alternator since it seems to power everything fine and then shuts down. That or some sort of loose connection. It's too dark to check now. Either way, pretty annoying start for my first jeep. It's been having trouble getting started on the first try lately as well. It sounds like a flywheel problem (from my limited knowledge) since my uncle used to have that issue on his old ford truck. He'd have to take a wrench and adjust it so the teeth would catch on the next rotation and it would start right up.

Anyway, any clues or standard jeep issues? It's a long weekend so I'm with no vehicle and I'm guessing it'll take 2-3 trips to get it home.
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Old 09-03-2011, 12:47 AM   #12
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Check those vacuum hoses. All of them. When you get It to crank what reading do you Get on the voltmeter? Should Be around 13-14 volts. Right in the middle. If lower, or higher, you've got a bad alternator,
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Old 09-03-2011, 09:04 AM   #13
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I would guess the reason you uncle had to turn the flywheel to get his old truck to start was that the flywheel either had chipped teeth or they were badly worn. This would be indicated by a rather loud "whir" from your starter rather than the usual cranking sound you hear. When you say that yours isn't starting the first time do you mean that the starter just clicks or does it turn the engine over but the engine doesn't fire. If it clicks then you're guess about the battery /alternator might be the first things to check. If it turns over but doesn't fire then check fuel / ignition. Just remember that an engine needs 4 things to run: fuel, fire, air, and compression. Also remember the best rule for troubleshooting: KISS. Keep It Simple, Stupid. What that means is always start with the simplest solution and involve a component that is more likely to fail. In this case a bad alternator or clogged fuel filter vs. a chipped flywheel.
As far as off to a bad start, don't feel to bad. I've not had a vehicle break down on me in over 15 years, but not long after I got my Jeep I had to call for a tow. The clutch went out on me and there was no way to get through heavy traffic. I think it must be a Jeep's way seeing if you'll stick with it or give up .
Remember that most auto parts stores will check batteries and alternators at no cost. And, if you didn't already know, you can check your engine codes yourself. Do a search on how to check and what the codes mean.
Good luck and let us know what you figure out.

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It's for looks, I don't trash it.
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