cruiser54

Probably not. The ECU likely has enough headroom to handle the increase in air flow.

HO myth buster Renix in 90 made 182 HP. HO in 91 made 190 HP. That's 8 HP difference. HO only made more HP than Renix at higher RPMs and not a bit more torque. HO had a 58 mm throttle body versus a 52 mm throttle body on a Renix. That’s 20% more air available through the HO throttle body. The HO also had a better design header. See where I'm going with this? It’s only a 4% horsepower increase….. The whole 8HP was not mostly from the head, but from the bigger TB and better exhaust manifold. Put a 60mm TB from www.strokedjeep.com on your present manifold using the Renix head, eliminate the "crush" in your headpipe with proper re-routing, and go for it. HO stands for Highly Overrated. __________________

I've gotten at least 10 of them from Jeff. All of them absolutely beautiful.

Jeff Leigh is still boring Jeep throttle bodies!! His contact info is email only and he only accepts money orders now. radiotech123@yahoo.com . And his website: http://strokedjeep.com/

It's hot metal cooling and is perfectly normal.

CRUISER'S MOSTLY RENIX TIPS THROTTLE BODY AND IAC CLEANING OCTOBER 30, 2015 SALAD 26 COMMENTS EDIT Originally by TJWalker of CherokeeForum & JeepForum The Idle Air Control (IAC) is mounted on the back of the throttle body (front for ’87-’90). The valve controls the idle speed of the engine by controlling the amount of air flowing through the air control passage. It consists of a stepper motor that moves a pintle shaped plunger in and out of the air control passage. When the valve plunger is retracted, the air control passage flows more air which raises the idle speed. When the valve plunger is extended, the air control passage flows less air which lowers the idle speed. Over time and miles, the IAC can get carboned up which can have an adverse affect on idle quality. Cleaning the IAC may restore proper function and is an easy procedure to perform and good preventive maintenance so it is never a bad idea. This should be part of a normal tune-up procedure and whenever idle/stalling issues are present. CLEANING THE JEEP 4.0 IDLE AIR CONTROL Remove the air filter cover, associated hoses and the rubber boot that goes from the air filter cover to the throttle body. Remove the IAC with a Torx driver (2 bolts; one can be kind of hard to get to). On ’91 and later, it may be easier to just remove the whole throttle body. Be sure to use a new throttle body to manifold gasket when reinstalling. “Gently” wiggle out the IAC from the throttle body. Gasket/O-ring on the IAC can be re-used if it is not damaged Clean the IAC with a spray can of throttle body cleaner; inexpensive and available at any place that sells auto parts. Throttle body cleaner is recommended rather than carburetor cleaner as it is less harsh, safe for throttle body coatings and oxygen sensors. Use cleaner, a rag and a toothbrush and or Q-Tips. Be gentle; don’t twist or pull on the pintle that protrudes from the IAC as it is fragile and you could damage it. Thoroughly spray clean and flush where the IAC seats in the throttle body with the same spray cleaner. It is also a good idea to clean the entire throttle body bore itself, the butterfly valve inside of the throttle body and it’s edges, and all associated linkage as long as you have things disassembled.

Pump the clutch pedal 50 times and walk away for 15 minutes. See if that helps.

Make sure your "trans" fuse isn't blown in the fusebox.

that's pretty close to me, eh?

Be sure your CPS wiring doesn't get into the exhaust manifold area!!

Trevor is a great guy. He gets you the proper injectors and they are flow matched. The specs and flow rates are provided with the injectors.

Phil, where are you located? A friend of mine in Prescott, Arizona told me yesterday he has a core 4 cylinder motor.

a fellow Jeep owner. trevor.skankfootracing@gmail.com

^^THIS^^

Welcome to working on cars............

Whaddya wanna bet your poor idle is caused by a vacuum leak at the intake manifold? Bolts are notorious for backing out and there's a few hoses that crack also. Photo attached. Have you ever refreshed your firewall ground?

Not sure this exists: reputable engine remanufacturing companies

Booster for the win!!

It's all over the world. Just with different names. LOL

NICE!!

and I thought I was a Redneck!!

It's still pliable? I added trim screws in between the existing clips to flatten it out.

Let's see a pic.

Do you have your old ones?

On my 87 when I got it, the PO had sealed those wonky early style strips to the A pillar. There was way less noise than my 90 had. So, I added some trim screws to the warpy parts of the 90's weatherstrip flattening it out and it became much quieter.