Whitaker717 Posted February 17, 2022 Share Posted February 17, 2022 One other issue I am having guys is my Comanche takes like 6 or 7 cranks to turn over. I’m worried my battery will start to go dead. Is there anything I can do to speed up crank over time? I did put in a new cap, rotor, and plugs but that’s all. Link to comment Share on other sites More sharing options...
jpnjake Posted February 17, 2022 Share Posted February 17, 2022 Id suggest recording the sound and posting it on here. Also from what I have noticed is the renix models take longer to start than any of the high output models. As well the engine type and year as well as outdoor temperature is also important. Link to comment Share on other sites More sharing options...
acfortier Posted February 17, 2022 Share Posted February 17, 2022 I want to say this is pretty normal... My HO takes probably 4-5 cranks before starting. Link to comment Share on other sites More sharing options...
Pete M Posted February 17, 2022 Share Posted February 17, 2022 the engine will crank until the computer is absolutely positively certain about where the engine is in it's rotation. some guys have found benefit from replacing the CPS or fixing corrosion in its wire harness. no promises though, as this is a very common occurrence for renix Jeeps. Link to comment Share on other sites More sharing options...
gogmorgo Posted February 17, 2022 Share Posted February 17, 2022 I'm curious how you guys are counting "cranks". If you're talking about the rise and fall in starter motor speed with each compression stroke, 6 of those is two full engine rotations (for a 4.0, 3 for a 2.5) which is not a lot and very different from holding the key for six ten-second cranking sessions with cool-down time in between. My 2.5 loses its fuel pump prime while it sits, resulting in some very extended cranking times, especially first thing in the morning. I usually cycle the key a bunch before starting it which helps prime the system but doesn't completely cure long cranks. I haven't bothered doing anything about it because it's been this way the whole time I had the truck, and it always starts and I'm lazy, but it does sometimes turn heads in public because it takes longer to start. By long cranks I mean holding the key in the start position for 5-8 seconds. Link to comment Share on other sites More sharing options...
MiNi Beast Posted February 18, 2022 Share Posted February 18, 2022 1 hour ago, gogmorgo said: I'm curious how you guys are counting "cranks". If you're talking about the rise and fall in starter motor speed with each compression stroke, 6 of those is two full engine rotations (for a 4.0, 3 for a 2.5) which is not a lot and very different from holding the key for six ten-second cranking sessions with cool-down time in between. My 2.5 loses its fuel pump prime while it sits, resulting in some very extended cranking times, especially first thing in the morning. I usually cycle the key a bunch before starting it which helps prime the system but doesn't completely cure long cranks. I haven't bothered doing anything about it because it's been this way the whole time I had the truck, and it always starts and I'm lazy, but it does sometimes turn heads in public because it takes longer to start. By long cranks I mean holding the key in the start position for 5-8 seconds. Thats my issues as well currently. Fuel pump needs replaced with tank. I rather enjoy the long crank, start then die and then rev up and settle and stumble then purr like a kitten. also since my neighbor has decided to tell me fu over whatever issues, i rather like starting the rig up next to their bedroom window first thing in the morning. Gotta love America and the city life! Link to comment Share on other sites More sharing options...
Whitaker717 Posted February 18, 2022 Author Share Posted February 18, 2022 3 hours ago, gogmorgo said: I'm curious how you guys are counting "cranks". If you're talking about the rise and fall in starter motor speed with each compression stroke, 6 of those is two full engine rotations (for a 4.0, 3 for a 2.5) which is not a lot and very different from holding the key for six ten-second cranking sessions with cool-down time in between. My 2.5 loses its fuel pump prime while it sits, resulting in some very extended cranking times, especially first thing in the morning. I usually cycle the key a bunch before starting it which helps prime the system but doesn't completely cure long cranks. I haven't bothered doing anything about it because it's been this way the whole time I had the truck, and it always starts and I'm lazy, but it does sometimes turn heads in public because it takes longer to start. By long cranks I mean holding the key in the start position for 5-8 seconds. I would say mine is a good 8 seconds. With that being said it cranked tonight about 5 seconds and wouldn’t crank. I was also working on it for a bit with the door open. Although I did disconnect my battery. My battery is a 2017 battery and he has been sitting a lot lately. Maybe it’s time to replace the battery. It’s like 540 CCA. Link to comment Share on other sites More sharing options...
gogmorgo Posted February 18, 2022 Share Posted February 18, 2022 No sense replacing it just cause, they’re not cheap. Sitting fully charged isn’t usually much of an issue. You can have it load tested if you want, most parts stores should be able to do that for you. That said, five years seems to be typical life expectancy on a battery that is in regular use and not being left discharged on the regular, but I’ve also seen them last over ten. Link to comment Share on other sites More sharing options...
Whitaker717 Posted February 18, 2022 Author Share Posted February 18, 2022 Well it was a whopping 6 degrees this morning and he wouldn’t start. The starter just clicked. I jumped him and he started. He definitely doesn’t like the cold. I’m guessing I should replace the battery but idk at this point. Link to comment Share on other sites More sharing options...
rokinn Posted February 18, 2022 Share Posted February 18, 2022 Cold will bring out the worst in a failing battery. You may check to make sure your cell levels are where they should be as well as getting a good charge on it with a charger. Then have it load tested. My guess is that you need a new one however. Starting with it jumped is a sign your battery isn't up to snuff. Link to comment Share on other sites More sharing options...
gogmorgo Posted February 18, 2022 Share Posted February 18, 2022 Yeah assuming it was fully charged when parked with no excessive drains I'd say that battery is on its way out. 6°F isn't all that cold, all things considered, but still cold enough I would be concerned about leaving a battery outside and discharged. Link to comment Share on other sites More sharing options...
big66440 Posted February 19, 2022 Share Posted February 19, 2022 Mine always cranks any where from 6-10 seconds before it starts, I’ve done all of Cruisers tips and even installed the factory bypass for the CPS without any luck. Even if I prime the system a few times ( I’ve verified there’s fuel pressure with a gauge ) it doesn’t make a difference, funny thing is once the truck starts (even if it only runs for a few seconds) it starts up normally afterwards. Link to comment Share on other sites More sharing options...
Eagle Posted February 19, 2022 Share Posted February 19, 2022 19 minutes ago, big66440 said: Mine always cranks any where from 6-10 seconds before it starts, I’ve done all of Cruisers tips and even installed the factory bypass for the CPS without any luck. What factory bypass for the CPS. Did you mean bypass for the ballast resistor? Link to comment Share on other sites More sharing options...
cruiser54 Posted February 20, 2022 Share Posted February 20, 2022 TSB # 18-51-88 You can effectively do almost the same thing by bypassing the C101 with the CPS wires. Link to comment Share on other sites More sharing options...
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