- City
- Biloxi
- State
- MS
Incredibly nice! would you like to take mine and work on it while I drive yours a while??? Please?
I'm wondering if youve done any mileage checking with the EFI install complete and the drive to Laurel for testing? I did the efi with a 4.0 head in March and I agree with your assessment on the throttle response and driveability, I'm running an auto trans and wonder if that's what is impacting my power and mileage to where my overall performance isnt what it might be. I couldnt keep up with a stock TJ yesterday morning and she wasnt even getting into it... Like you I'm running 4.10s and 35s
Thanks
Appreciate it
I can't take on any more Scramblers right now, I still have one of "JeepAddicts" refugees in my yard LOL
If I get back out to New Mexico again anytime soon I will definitely let you borrow it
I have done a little MPG checking since I put on the EFI.
1) I drove from Biloxi, MS to Mobile, AL a couple of weeks back. Close to 120 mile round trip. All I10 Interstate driving, mainly flat, no real hills or grades. With light traffic, I was able to maintain a near constant speed, i.e. no speeding up and slowing down. I did not have the top or doors on. I got right at 17 MPG at 70 MPH.
2) Drove from Biloxi, MS to Laurel, MS the other day. I only kept up with the mileage on the way up there. Close to 100 miles, one way. Main route was HWY 49 to I59. Trip consisted of several red lights, one unexpected stop (problem with another Jeep), and inconsistent speed (between 65-75 MPH). This route is kind of hilly. No super steep grades, but lots of rolling hills. I had the top and doors on. I got right at 15-15.5 MPG. I think the biggest reason for the drop in mileage was the inconsistent speed.
3) When I got to Laurel, I filled up with gas. I drove around all day (from 9:30AM to 3:30PM) in the national forest. This driving consisted of hubs locked in driving, 4 wheel drive usage, extended idling, up to 40 MPH blasts down gravel roads, mud riding, etc. I did not keep up with the miles, unfortunately. But, I only burned 5 gallons of gas, which I did not think was too bad, and we did drive quite a bit on the gravel service roads, I would guess we probably drove around 40 miles.
As far as power, I can easily keep up with a stock TJ. My power feels strong all the way up to around 70 MPH. I can still pass people and go faster then 70 MPH, but the tire size really takes its toll on high speed acceleration after 70 MPH. I can comfortably pass people on the interstate, but I can definitely tell that I don't have a V8 any more LOL. Overall, I am more then pleased with the overall power, way stronger then when I had a carb. Not V8 strong, but I like this setup better, especially the MPG. My 304 powered CJ-7 was only getting 13 MPG on the highway (304, 4 speed, 3.73's and 33's), but it had loads of power.
My 4 speed manual transmission setup might give me a slight performance edge over an auto

You might need to run a scan on your EFI. I borrowed the mechanic from works scanner the other day. I only had 1 code pop up, a code 37, "Short in Torque Converter part Throttle Unlock Solenoid". I am using the automatic computer with a manual transmission. I think I might need to ground the brown wire that comes out of my EFI harness, but I am waiting to hear back from Hesco before I start grounding out wires



By using the auto trans computer with a manual transmission, the computer is not getting any feedback from the trans telling it "hey, its in Park or Neutral, this is a cold start situation". Basically, my motor will start up, run rough for a little bit (about 15 seconds), until the computer realizes that the engine is running, then it adjusts. With my current set up, nothing is telling my computer to go to "Start" mode. I guess I will have a spare Auto trans MPI computer for sale soon


