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Unread 05-02-2013, 09:00 AM   #1
TJMike2011
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1998 TJ Wrangler 
 
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Timing adjustment

Hi- I have A 98 TJ with a 2.5l 4cyl. The motor is fresh, with about 4500 miles on it. It runs fine, but seems to lose power when it starts to pull uphill, loses RPM's and bogs down quickly. Is it in the timing?

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Unread 05-02-2013, 08:02 PM   #2
laybackman
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Originally Posted by TJMike2011 View Post
Hi- I have A 98 TJ with a 2.5l 4cyl. The motor is fresh, with about 4500 miles on it. It runs fine, but seems to lose power when it starts to pull uphill, loses RPM's and bogs down quickly. Is it in the timing?

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What happens when you are stopped and the tranny is in park and you give it gas to increase rpm's?

BTW timing is controlled by the ECM and is not adjustable.
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Unread 05-02-2013, 09:22 PM   #3
TJMike2011
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It idles at around 800 RPM's, manual tranny. I know that timing is controlled by ECU, but looking for a work around to advance timing a click or 2.

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Unread 05-03-2013, 06:43 AM   #4
laybackman
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Quote:
Originally Posted by TJMike2011 View Post
Hi- I have A 98 TJ with a 2.5l 4cyl. The motor is fresh, with about 4500 miles on it. It runs fine, but seems to lose power when it starts to pull uphill, loses RPM's and bogs down quickly. Is it in the timing?

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You are running 33's with 4.11's being pushed by 4 angry squirrels. It will bog down on hills in fifth gear....downshift!
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Chicks dig me.....Fish fear me

Getting older, I have developed some special skills. I have the ability to cough, sneeze, fart and pee at the same time.

"If we cannot afford to take care of Veterans, then we should stop making them."
David C. Wilker Jr. USAF (RET)
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Unread 05-03-2013, 07:16 AM   #5
TJMike2011
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This is an on going problem, not just since I added new tires. Had lack of power from the beginning, very sluggish below 1500 RPM's, but comes alive above that in any gear until she needs to pull a slight grade.

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Unread 05-03-2013, 08:18 AM   #6
laybackman
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Quote:
Originally Posted by TJMike2011 View Post
This is an on going problem, not just since I added new tires. Had lack of power from the beginning, very sluggish below 1500 RPM's, but comes alive above that in any gear until she needs to pull a slight grade.

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The small engine has no low end torque. It needs higher RPM's to perform. That is why your engine dies on any hill because it doesn't have the low end torque like a larger V8 has.
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Getting older, I have developed some special skills. I have the ability to cough, sneeze, fart and pee at the same time.

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