Engine Stock TB - smoke test - leaking bad

[Jarhead67]

Hey everyone,

I have a strange idle issue. when the engine is warmed up it idles good but as soon as you tap the gas or stop at a red light, idle goes up to about 1200 and slowing comes back down under 1000. It’ll usually hunt a little then finally calm down. Did a smoke test and found three areas of a lot of smoke leaking. Egr valve out the vent holes, out the tps and i even have a tps without a hole and the last leak is under the TB at the spring shaft. all three locations was releasing a ton of smoke. TB is stock from 1987. Is this TB toast? would I be able to rebuild the seals or better to just upgrade? I read that they all leak a little but there was a ton of smoke coming out .

Time to replace the throttle body, EGR, and TPS. Now might be a good time to remove EGR and put an EGR delete plate on it.

 

[Jarhead67]

Hey everyone,

I have a strange idle issue. when the engine is warmed up it idles good but as soon as you tap the gas or stop at a red light, idle goes up to about 1200 and slowing comes back down under 1000. It’ll usually hunt a little then finally calm down. Did a smoke test and found three areas of a lot of smoke leaking. Egr valve out the vent holes, out the tps and i even have a tps without a hole and the last leak is under the TB at the spring shaft. all three locations was releasing a ton of smoke. TB is stock from 1987. Is this TB toast? would I be able to rebuild the seals or better to just upgrade? I read that they all leak a little but there was a ton of smoke coming out .

LMR has Accufab, BBK, and SVE throttle bodies. SVE are a little cheaper.
Have you checked CJPony or BLUEOVAL?

 

[Noobz347]

LMR has Accufab, BBK, and SVE throttle bodies. SVE are a little cheaper.
Have you checked CJPony or BLUEOVAL?

Did you read the whole thread?

Fixes are already in motion.

 

[R82148V]

Update -

Just received the Accufab 65mm TB and matching EGR. Working on port matching the intake to match the EGR spacer and installing all the other parts to it. This thing is beautiful! Updates to follow

 

[Noobz347]

Update -

Just received the Accufab 65mm TB and matching EGR. Working on port matching the intake to match the EGR spacer and installing all the other parts to it. This thing is beautiful! Updates to follow

I've suggested to Accufab before that they need to make throttle body Christmas tree ornaments.

 

[R82148V]

Update -

Just received the Accufab 65mm TB and matching EGR. Working on port matching the intake to match the EGR spacer and installing all the other parts to it. This thing is beautiful! Updates to follow

Update -

LOOKS AND FEEL
TB and EGR spacer has been installed. Looks great! I noticed the throttle blade doesn't have that small hole the way the stock one does.
It runs so so much better, cleaner and much more throttle responsive. Also, with the stock TB at highway speeds, 4th gear going into higher RPMS, you could feel almost like a drop off in pull once you reached 4000ish. Like it was running out of breath or something. With this 65mm Accufab, that feeling is gone! At 4k rpm in 4th, it just wanted to keep pulling !!

IDLE
I did the idle reset but only how accufab instructed me to. To get the TPS at .98 v and never touch the throttle plate screw. I did this on a cold engine though.
Idle seems better than it was with the RPMS dropping quickly to idle. Hunting is almost gone but still a little there.? No where as bad as before.
Could this be because I did the base idle adj at cold or is the PCM still learning?
I never did the full base idle adjustment that we all know about as in un plug the spout, and IAC, do adj with engine off then disconnect the batt and run it for 2 min with no accessories on then 2 mins with on? would this sort of this be best?

 

[General karthief]

Try the computer reset,

 

[Noobz347]

You cannot properly set idle with the spout connector in. The EEC tries to makeup for your screw adjustments with timing.

 

[R82148V]

You cannot properly set idle with the spout connector in. The EEC tries to makeup for your screw adjustments with timing.

I'll do the base idle reset again but the full version with the spout conn out. I'll report back !!

Thank you!