Idle Speed and Oil Pressure question
 

Hi.. I have the Haynes manual but I trust you guys more than some
manual. Just because it's written and published, doesn't make it true.
1) What should my engine (warm) be idling at? It is presently revving @
500 rpm
2) I have been using K&N oil filters since i got the TJ in may, and I
notice a slightly higher pressure cold. sometimes as high as 3/4 needle
(3.8 or 4?) units?

Re: Idle Speed and Oil Pressure question
 

2002 4.0 L sorry

Re: Idle Speed and Oil Pressure question
 

2002 4.0 L sorry

Re: Idle Speed and Oil Pressure question
 

2002 4.0 L sorry

Re: Idle Speed and Oil Pressure question
 

Thoth1126@gmail.com wrote:
> Hi.. I have the Haynes manual but I trust you guys more than some
> manual. Just because it's written and published, doesn't make it true.
> 1) What should my engine (warm) be idling at? It is presently revving @
> 500 rpm
> 2) I have been using K&N oil filters since i got the TJ in may, and I
> notice a slightly higher pressure cold. sometimes as high as 3/4 needle
> (3.8 or 4?) units?

2002 4.0 - gotcha. Idle specs aren't normally provided, as there is no
adjustment possible. My '05 TJL ticks over about 550 idle when warm, so
you're in the ballpark. If you think idle quality is an issue, clean
the throttle body with some TB spray and a soft toothbrush & a soft rag.

Higher oil pressures at cold startup is normal. Very high pressure
isn't. Higher pressures mean flow is impeded, and this is not good.
The K&N might have more restrictive pleating. If you stick to the OEM
viscosity spec for the COLDEST startup conditions, it shouldn't be a
problem.

Also, I wouldn't trust Haynes for much of anything.

Re: Idle Speed and Oil Pressure question
 

Thoth1126@gmail.com wrote:
> Hi.. I have the Haynes manual but I trust you guys more than some
> manual. Just because it's written and published, doesn't make it true.
> 1) What should my engine (warm) be idling at? It is presently revving @
> 500 rpm
> 2) I have been using K&N oil filters since i got the TJ in may, and I
> notice a slightly higher pressure cold. sometimes as high as 3/4 needle
> (3.8 or 4?) units?

2002 4.0 - gotcha. Idle specs aren't normally provided, as there is no
adjustment possible. My '05 TJL ticks over about 550 idle when warm, so
you're in the ballpark. If you think idle quality is an issue, clean
the throttle body with some TB spray and a soft toothbrush & a soft rag.

Higher oil pressures at cold startup is normal. Very high pressure
isn't. Higher pressures mean flow is impeded, and this is not good.
The K&N might have more restrictive pleating. If you stick to the OEM
viscosity spec for the COLDEST startup conditions, it shouldn't be a
problem.

Also, I wouldn't trust Haynes for much of anything.

Re: Idle Speed and Oil Pressure question
 

Thoth1126@gmail.com wrote:
> Hi.. I have the Haynes manual but I trust you guys more than some
> manual. Just because it's written and published, doesn't make it true.
> 1) What should my engine (warm) be idling at? It is presently revving @
> 500 rpm
> 2) I have been using K&N oil filters since i got the TJ in may, and I
> notice a slightly higher pressure cold. sometimes as high as 3/4 needle
> (3.8 or 4?) units?

2002 4.0 - gotcha. Idle specs aren't normally provided, as there is no
adjustment possible. My '05 TJL ticks over about 550 idle when warm, so
you're in the ballpark. If you think idle quality is an issue, clean
the throttle body with some TB spray and a soft toothbrush & a soft rag.

Higher oil pressures at cold startup is normal. Very high pressure
isn't. Higher pressures mean flow is impeded, and this is not good.
The K&N might have more restrictive pleating. If you stick to the OEM
viscosity spec for the COLDEST startup conditions, it shouldn't be a
problem.

Also, I wouldn't trust Haynes for much of anything.

Re: Idle Speed and Oil Pressure question
 

Outatime wrote:

>
> 2002 4.0 - gotcha. Idle specs aren't normally provided, as there is no
> adjustment possible. My '05 TJL ticks over about 550 idle when warm, so
> you're in the ballpark. If you think idle quality is an issue, clean
> the throttle body with some TB spray and a soft toothbrush & a soft rag.
>
> Higher oil pressures at cold startup is normal. Very high pressure
> isn't. Higher pressures mean flow is impeded, and this is not good.
> The K&N might have more restrictive pleating. If you stick to the OEM
> viscosity spec for the COLDEST startup conditions, it shouldn't be a
> problem.
>
> Also, I wouldn't trust Haynes for much of anything.

Thanks - Mine is around 550 rpm as well. The oil pressure isn't very
high, but its high compared to what I'm used to. The K&N is a higher
flowing filter and traps more dirt. They run about 17.99 at Canadian
Tire. I just switched over to synthetic oil my last oil change.

Re: Idle Speed and Oil Pressure question
 

Outatime wrote:

>
> 2002 4.0 - gotcha. Idle specs aren't normally provided, as there is no
> adjustment possible. My '05 TJL ticks over about 550 idle when warm, so
> you're in the ballpark. If you think idle quality is an issue, clean
> the throttle body with some TB spray and a soft toothbrush & a soft rag.
>
> Higher oil pressures at cold startup is normal. Very high pressure
> isn't. Higher pressures mean flow is impeded, and this is not good.
> The K&N might have more restrictive pleating. If you stick to the OEM
> viscosity spec for the COLDEST startup conditions, it shouldn't be a
> problem.
>
> Also, I wouldn't trust Haynes for much of anything.

Thanks - Mine is around 550 rpm as well. The oil pressure isn't very
high, but its high compared to what I'm used to. The K&N is a higher
flowing filter and traps more dirt. They run about 17.99 at Canadian
Tire. I just switched over to synthetic oil my last oil change.

Re: Idle Speed and Oil Pressure question
 

Outatime wrote:

>
> 2002 4.0 - gotcha. Idle specs aren't normally provided, as there is no
> adjustment possible. My '05 TJL ticks over about 550 idle when warm, so
> you're in the ballpark. If you think idle quality is an issue, clean
> the throttle body with some TB spray and a soft toothbrush & a soft rag.
>
> Higher oil pressures at cold startup is normal. Very high pressure
> isn't. Higher pressures mean flow is impeded, and this is not good.
> The K&N might have more restrictive pleating. If you stick to the OEM
> viscosity spec for the COLDEST startup conditions, it shouldn't be a
> problem.
>
> Also, I wouldn't trust Haynes for much of anything.

Thanks - Mine is around 550 rpm as well. The oil pressure isn't very
high, but its high compared to what I'm used to. The K&N is a higher
flowing filter and traps more dirt. They run about 17.99 at Canadian
Tire. I just switched over to synthetic oil my last oil change.