Jeep Wrangler Forum banner
  • Hey everyone! Enter your ride HERE to be a part of JUNE's Ride of the Month Challenge!

how long does your engine turn over before first cylinder ignition?

  • 1 second

    Votes: 5 18.5%
  • 2 seconds

    Votes: 11 40.7%
  • 3 seconds

    Votes: 6 22.2%
  • 4+ seconds

    Votes: 5 18.5%
1 - 14 of 14 Posts

·
Registered
Joined
·
539 Posts
Discussion Starter · #1 ·
My jeep takes about a solid 4 or 5 seconds to turn over and ignition in the first cylinder from a cold start. If the engine is warm then it takes about 1 or 2 seconds.
 

·
Registered
Joined
·
539 Posts
Discussion Starter · #4 ·
should I be worried about such a long turn over time to get ignition?
 

·
Registered
Joined
·
1,272 Posts
what motor do you have? stock? if its a 4.0 or 2.5 wait a few seconds after turning the key to let the fuel pump build pressure
if its a 4.2 I wouldn't worry about it, when I had a weber carb if it sat for more than a day it took forever to start. the holley I have now starts within 2 turns.
I have read that on the 4.2 the return line on the fuel filter should be on top so the filter doesn't drain.
 

·
Mr Jeepy of California
Joined
·
466 Posts
I have a 2.5. Every cold start takes 2 seconds, after that it's about 1-2 seconds. I never have to turn it over multi times unless I changed the fuel filter. I will pump it about 3 times on cold starts but it works like a charm.
 

·
Registered
Joined
·
118 Posts
what motor do you have? stock? if its a 4.0 or 2.5 wait a few seconds after turning the key to let the fuel pump build pressure
if its a 4.2 I wouldn't worry about it, when I had a weber carb if it sat for more than a day it took forever to start. the holley I have now starts within 2 turns.
I have read that on the 4.2 the return line on the fuel filter should be on top so the filter doesn't drain.
I'll give that a shot. My 4.2 takes about 10 seconds to start.
 

·
Registered
Joined
·
259 Posts
Excessive crank times can be low compression, or more commonly the fuel pump is losing pressure when off and draining back to the tank slightly. My 2.5 does about 1.5-2 seconds every time, maybe up to 2.5 seconds in the winter on a cold day. Another common thing for computer controlled cars is that the computer has to wait for the engine to make enough of a revolution to get the cam and crank sensor locations. Older carbed cars with regular distributors could pretty much fire as soon as the key was hit if the gas was pumped a couple times as it did not need to wait for those sensors to pick up location.
 

·
Registered
Joined
·
539 Posts
Discussion Starter · #12 ·
Sorry I should have said my motor.... 95 YJ with the 4 banger
 

·
Registered
Joined
·
21 Posts
My 4.2 takes a few seconds on cold start I have to hit the gas a few times before starting but after its warmed up it doesn't have a problem but there have been a few times that It won't turn over or it will backfire but most times it does start right up
 
1 - 14 of 14 Posts
Top