The Central Hub for DSM Community and Information

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. This is where the DSM platform history is documented and archived. Log in to help us in our mission, and to remove most ads from the browsing experience.

HELP!! Rebuilt throttle body now have this problem :-(

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

boosted 96 eclipse

10+ Year Contributor
104
0
Aug 4, 2012
Cheyenne, Wyoming
Ok so I replaced my throttle shaft seals. But with o-rings that fit perfectly. Now to the issue. The car idles perfect now that I replaced the seals but won't rev passed 1,400 rpm's and covered the plugs in soft soot. Now that tells me that it's running really rich but why? Before replacing the shaft seals I replaced my DP with a Megan racing cat delete DP and I put in the o2 simulator and the car ran fine-ish it idled like crap because I knew I had a boost leak but it would rev passed 1,400rpms. Idk what to do other than maybe buying an actual rebuild kit for the throttle body?
 
Ok so I replaced my throttle shaft seals. But with o-rings that fit perfectly. Now to the issue. The car idles perfect now that I replaced the seals but won't rev passed 1,400 rpm's and covered the plugs in soft soot. Now that tells me that it's running really rich but why? Before replacing the shaft seals I replaced my DP with a Megan racing cat delete DP and I put in the o2 simulator and the car ran fine-ish it idled like crap because I knew I had a boost leak but it would rev passed 1,400rpms. Idk what to do other than maybe buying an actual rebuild kit for the throttle body?

Did you adjust your TPS correctly upon re-installation?
 
How did you reset your BISS Screw? I see you don't have ecmlink.

Also are you sure your throttle cable is set correctly.

How do you know you set your tps correctly? what are the volts?

Does it make a difference if you rev it from inside the car with the gas pedal or if you rev it by hand at the throttle body?
 
I have an safc. But my BISS is set so the car idles at 950 rpm's +-10.

Throttle cable is fine.

Because I used my multimeter. .734 v between pins 2 and 4. And pins 3 and 4 are set.

No it does not. The throttle cable is not sticking nor is the throttle plate.

None of those things to me could cause the car to not go past 1,400. ### one is for base idle, I open the throttle plate by hand, safc is showing throttle plate is opening 100% and closing to 0%.

I'm throwing a CEL and vacuum at idle is now 6 in. hg. Before putting O-RINGS in the vacuum was 12 in. Hg. The cel has to be from running so rich.

Ok so I put a different throttle body on and it's still doing the same thing. I also swapped out the plugs and guess what no change. Idk maybe I do need to check the tps again. I also made a throttle body gasket so maybe that's the problem too. I will check both and hopefully one of those two work.

MAF was disconnected from when I pulled the headlights out! Wow I'm a dumbass!!
 
I have an safc. But my BISS is set so the car idles at 950 rpm's +-10.

Throttle cable is fine.

Because I used my multimeter. .734 v between pins 2 and 4. And pins 3 and 4 are set.

No it does not. The throttle cable is not sticking nor is the throttle plate.

None of those things to me could cause the car to not go past 1,400. ### one is for base idle, I open the throttle plate by hand, safc is showing throttle plate is opening 100% and closing to 0%.

I'm throwing a CEL and vacuum at idle is now 6 in. hg. Before putting O-RINGS in the vacuum was 12 in. Hg. The cel has to be from running so rich.

Ok so I put a different throttle body on and it's still doing the same thing. I also swapped out the plugs and guess what no change. Idk maybe I do need to check the tps again. I also made a throttle body gasket so maybe that's the problem too. I will check both and hopefully one of those two work.

MAF was disconnected from when I pulled the headlights out! Wow I'm a dumbass!!

It's always the smallest thing. Glad you got it figured out :thumb:
 
Add Value - Be Respectful - No Trolling - No Misinformation - Participate Often!
Support Vendors who Support the DSM Community

Build Thread Updates

Latest Classifieds

  • For sale 4G63 3 inch Magnaflow SS high flow cat
    3 inch Magnaflow stainless cat. High flow. 18.25 inches. Flange holes are 4 1/8 center. Has...
    • Galant665
    • Updated:
  • For sale 4G63 Forge Motorsports BOV
    Original Forge Motorsports bov. Adjustable with over 80 clicks on the dial. Nice to use for...
    • Galant665
    • Updated:
  • Wanted 1g 1991 Black Cherry Eagle Talon
    5-speed
    • bamatalon
    • Updated:
    • Expires
  • For sale Misc Left Over Parts
    Hello, I have a few left over parts for sale, these do not include shipping, please pm me for a...
    • r3dmak
    • Updated:
    • Expires
  • For sale Alpha Injection Clinic 2200cc for 4G63 DSM/EVO
    I have a set of Alpha Injection Clinic 2200cc high z injectors for DSM/EVO. I am stepping up to...
    • spoolinpos
    • Updated:
    • Expires
Back
Top