Jeep Strokers

Finally got the exhaust put on my new stroker, put in a new o2 sensor and wideband 02 sensor for an air/fuel gauge. It starts fine and runs pretty good. Not sure exactly what readings are optimal for these stokers. At idle after starting it up it reads around 11.0-11.2 occasionally jumping up to 12-13. I took it for a cruise around the block and cruising at about 40-50mph (tachometer on order) it's running at around 13.5. Seem's like this is pretty rich to me, any advice is appreciated.

Running 91 Octane

Motor Build list below..

1988 JEEP 4.6L Renix W/ 7120 HO head
STAGE 2 STROKER KIT W/ MOLY RINGS .030 OVER (COMPRESSION 9.2:1-9.6:1 DEPENDING ON DECK HEIGHT)
4.2 L Connecting Rods
Sealed Power Cast Pistons
Hatings Cast Piston Rings
Scat 3.895” Stroke 9000 Series Performance Cast Steel Crankshaft Rod and Main Bearings 1
STAGE 2 PORTED HEAD #7130 CASTING!!!!!!!!!!!! 1.551"/2.000" VALVES
STAGE 2 CAM KIT (Bullet racing custom grind)
.490in .+488ex lift. 266/272 advertised duration. 214/218 duration @ .050 lift. 114LSA
ACCEL 24LB INJECTORS
FELPRO GASKET KIT #260-1548 (GASKETS FOR HO HEAD!!)
CAM BEARINGS FREEZE PLUGS OIL PUMP ZINC ADDITIVE

Renix, that makes it tougher.

Possibly that cam with so much duration is knocking your vacuum/MAP readings down and causing it to run rich.
What is your idle vacuum and cruise vacuum?

Maybe try your stock injectors and watch your AFR.

Try the stock injectors or a replacement injector with the same flow rating as a stock one. Most Renix with running rich issues work well with the stock injector.

jeepxj3 wrote:Renix, that makes it tougher.

No it doesn't.

Can't tune it.

jeepxj3 wrote:Renix, that makes it tougher.

Possibly that cam with so much duration is knocking your vacuum/MAP readings down and causing it to run rich.
What is your idle vacuum and cruise vacuum?

Maybe try your stock injectors and watch your AFR.

Not sure, don't have a working vacuum gauge handy.

SilverXJ wrote:Try the stock injectors or a replacement injector with the same flow rating as a stock one. Most Renix with running rich issues work well with the stock injector.

jeepxj3 wrote:Renix, that makes it tougher.

No it doesn't.

I took the jeep on it's first real drive today(30miles) since the new motor and all. After it warmed up It still idled around 11-12, varying. When cruising about 55 with traffic and on it a little bit it's getting between 14.5-15, depending on the throttle. If I let off the throttle will cruising same speed it goes back down to 12-13(richer). Do these readings seem pretty good?
It ran pretty good and drove great, only thing is I need to adjust my tps sensor for idle. Put a new tps on when I did the motor build and never adjusted it with a meter, just set it to as close as the same spot I could get. Is there a good thread on here for adjust TPS? Is it done by ohms?
Bought cold air intake to put on too..

I lost Reverse.

bpranes wrote:I took the jeep on it's first real drive today(30miles) since the new motor and all. After it warmed up It still idled around 11-12, varying.

with the larger injectors?

When cruising about 55 with traffic and on it a little bit it's getting between 14.5-15, depending on the throttle.

Normal

If I let off the throttle will cruising same speed it goes back down to 12-13(richer). Do these readings seem pretty good?

I'm not familiar with the Renix but on the OBD II it will go rick for a few seconds then either go back to !14.7 or go into decel cut off.

Is there a good thread on here for adjust TPS? Is it done by ohms?

http://www.naxja.org/forum/showthread.php?t=1072534

SilverXJ wrote:

bpranes wrote:I took the jeep on it's first real drive today(30miles) since the new motor and all. After it warmed up It still idled around 11-12, varying.

with the larger injectors?

When cruising about 55 with traffic and on it a little bit it's getting between 14.5-15, depending on the throttle.

Normal

If I let off the throttle will cruising same speed it goes back down to 12-13(richer). Do these readings seem pretty good?

I'm not familiar with the Renix but on the OBD II it will go rick for a few seconds then either go back to !14.7 or go into decel cut off.

Is there a good thread on here for adjust TPS? Is it done by ohms?

http://www.naxja.org/forum/showthread.php?t=1072534

Yea, still with the 24lb injectors

I can tell you 100% that 24lb injectors are too much for a Renix Stroker unless you are doing something crazy. Toss in the stock injectors, reset the ecu by pulling the battery cables and holding them together for 30 seconds, then connect it back up and give it a start. Once adjusted it should run fine. A tell tail sign it runs too rich is if you hear the engine start to run like crap like it's slowing down and about to die, then it jumps back up to normal rpm and does that once every few minutes. Means the computer can't pull enough fuel to run right and goes back to open loop. This may help you out: https://www.youtube.com/watch?v=dstyjD5Hy9Y

NickInTimeFilms wrote:I can tell you 100% that 24lb injectors are too much for a Renix Stroker unless you are doing something crazy.

Agree with you except that the OP's stroker is effectively a HO version that's merely controlled by a Renix ECU.