2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Tune up help '98 1500

Thread Tools
 
Search this Thread
 
Old May 15, 2011 | 12:36 PM
  #1  
Doc94's Avatar
Doc94
Thread Starter
|
Registered User
Joined: Mar 2011
Posts: 5
Likes: 0
From: Salisbury, NC
Post Tune up help '98 1500

I've got a '98 1500 that is my first truck, so I'm a little new at some things. I just replaced the fuel pump in it to get it to run, and now it cranks and will go down the road without any problems. The only complaint I have with it, is that there is a good delay when I push the gas down, and when it revs. I was thinking about putting some good gas in it (like a take of 93 octane) and a bottle of Z-max that has injector cleaner in it (I think they have that?) If anyone has any suggestions on what may help this problem let me know!

Thanks!
 
Reply
Old May 15, 2011 | 12:40 PM
  #2  
HeyYou's Avatar
HeyYou
Administrator
Veteran: Air Force
Community Favorite
15 Year Member
Community Builder
Joined: Apr 2010
Posts: 87,376
Likes: 4,209
From: Clayton MI
Default

TEST the throttle position sensor. Make sure it is giving the right info to the PCM.
 
Reply
Old May 15, 2011 | 12:44 PM
  #3  
dhvaughan's Avatar
dhvaughan
Hall Of Fame
Joined: Jul 2006
Posts: 12,204
Likes: 10
From: Gainesville, Ga.
Default

a bog-down when pressing the gas pedal might be a vacuum leak. there are a LOT of hoses attached to the throttle body which can crack and leak.

a simple test for finding the culprit is to temporarily remove and cap all hoses on TB, then test drive and see if its improved. if so, add them back one at a time to identify the bad one.

beware, without vac, you may not have power brakes, heater/ac, cruise, or transmission shift on very old models.
 
Reply
Old May 15, 2011 | 12:45 PM
  #4  
Doc94's Avatar
Doc94
Thread Starter
|
Registered User
Joined: Mar 2011
Posts: 5
Likes: 0
From: Salisbury, NC
Default

What do i need to test it? (like I said I'm a newbie)
 
Reply
Old May 15, 2011 | 12:46 PM
  #5  
HeyYou's Avatar
HeyYou
Administrator
Veteran: Air Force
Community Favorite
15 Year Member
Community Builder
Joined: Apr 2010
Posts: 87,376
Likes: 4,209
From: Clayton MI
Default

an analog voltmeter would be best.
 
Reply
Old May 15, 2011 | 12:48 PM
  #6  
dhvaughan's Avatar
dhvaughan
Hall Of Fame
Joined: Jul 2006
Posts: 12,204
Likes: 10
From: Gainesville, Ga.
Default

Originally Posted by Doc94
What do i need to test it? (like I said I'm a newbie)
using an analog or digital voltage tester, probe the pins of the connector.
it should read something like .6 volts at idle position, and then increase voltage on a smooth curve as you rotate the throttle open.

the exact voltage numbers don't matter so much as the smooth increase from idle to full open. you want no gaps, jumps, or herky jerky changes.
 
Reply
Old May 15, 2011 | 12:50 PM
  #7  
HeyYou's Avatar
HeyYou
Administrator
Veteran: Air Force
Community Favorite
15 Year Member
Community Builder
Joined: Apr 2010
Posts: 87,376
Likes: 4,209
From: Clayton MI
Default

Originally Posted by dhvaughan
using an analog or digital voltage tester, probe the pins of the connector.
it should read something like .6 volts at idle position, and then increase voltage on a smooth curve as you rotate the throttle open.

the exact voltage numbers don't matter so much as the smooth increase from idle to full open. you want no gaps, jumps, or herky jerky changes.
That's why I suggest using an analog meter. Much easier to verify that the sweep is smooth over the digital meter. (I have both.....)
 
Reply
Old May 15, 2011 | 12:56 PM
  #8  
dhvaughan's Avatar
dhvaughan
Hall Of Fame
Joined: Jul 2006
Posts: 12,204
Likes: 10
From: Gainesville, Ga.
Default

^ agreed.
 
Reply




All times are GMT -4. The time now is 01:57 AM.