Intake Manifold

[Calabrio]

I follow the plastic intake tube to the manifold and discover that the plastic ring that the intake tube sits in is cracked. It seems likely to me that it might be sucking some air from around the bottom of the seal.

Is this part available by itself, or do I need to replace the entire intake manifold.

If the intake manifold itself has to be replaced (thanks to Ford's reliance on plastic parts! ) what are my options? Is there an after market alternative with some performance benefit requiring no modification?

By the way, I just finished the 02 sensors, I'd really like to beat the hell out of the engineer team who designed that.

 

[unity]

Ya, ditto on the O2s...

As for the plastic thingy? What year? The only thing I can think of is the rubber seal that is suppose to stay on the intake tube. The throttle body and intake have no plastic parts really. So is it the seal between the intake tube and the throttle body?

 

[MonsterMark]

Buy one of these from Thomas A over on markviii.org.

 

[Calabrio]

...yeah- it was the rubber seal I was looking at. Mine had come off of the intake tube and stayed behind on the throttle body. I saw the cut away spot and assumed it was broken plastic...

I was hopping I'd found the problem with the car, apparently I haven't yet. I can not figure out why the RPMs keep surging when cruising. Almost like the torque converter is locking/unlocking or there is a miss..... very frustrating.

My hands and arms simply did not fit, so doing the O2 sensors meant that I have cuts, scrapes and burns all over both my hands and arms right now. The crows foot wrench did work though. I had more trouble connection/disconnecting the wires than I did anything else.

 

[02LSE96LSC91SE84TC]

...yeah- it was the rubber seal I was looking at. Mine had come off of the intake tube and stayed behind on the throttle body. I saw the cut away spot and assumed it was broken plastic...

I was hopping I'd found the problem with the car, apparently I haven't yet. I can not figure out why the RPMs keep surging when cruising. Almost like the torque converter is locking/unlocking or there is a miss..... very frustrating.

My hands and arms simply did not fit, so doing the O2 sensors meant that I have cuts, scrapes and burns all over both my hands and arms right now. The crows foot wrench did work though. I had more trouble connection/disconnecting the wires than I did anything else.

Could it be your a/c compressor, it kicks in and out with the heater set on certain settings like defrost.

That rubber piece does have a section that is notched.

 

[turborich]

Those O2 sensors look like a PITA! Why couldn't they have just placed them in a more open area? Just doesn't make sense!

 

[ponytail john]

Calabrio, My 93 is doing the same thing now. The intake was changed but the shop kept the TB and the IAC valve that came with it instead of putting the ones from mine and my car didn't do that before the intake was changed. Now when cruising around 45 and especially with the air on I get that dam surging sh*t. Today I put my old TB on and no difference so I would say it's the IAC valve which I tried to change too but kept dropping sockets and extensions etc. and I didn't want the neighbors listening to any more of my cursing so it wasn't done. My idle is also higher than before which was like 600 RPM's in D and now like at least 700-750 RPM's. All the shop says is "That's what the PCM is calling for".

 

[Calabrio]

Calabrio, My 93 is doing the same thing now. The intake was changed but the shop kept the TB and the IAC valve that came with it instead of putting the ones from mine and my car didn't do that before the intake was changed. Now when cruising around 45 and especially with the air on I get that dam surging sh*t. Today I put my old TB on and no difference so I would say it's the IAC valve which I tried to change too but kept dropping sockets and extensions etc. and I didn't want the neighbors listening to any more of my cursing so it wasn't done. My idle is also higher than before which was like 600 RPM's in D and now like at least 700-750 RPM's. All the shop says is "That's what the PCM is calling for".

I noticed the surging when I had a bad torque converter, so I assumed it would be resolved when I put the new transmission in.

With the transmission out, I installed a new IACV.
It didn't solve the problem. So I replaced the cracked EGR tube.
No luck.
So I put two new coils on.
no luck.
I installed a new MLPS.
No luck.
Regapped the fairly new double platinum plugs.
no luck.

I hopped I found a leak under the intake tube, that looks like a bust.

I'm stumped.

 

[ponytail john]

I see you did change the IAC, man, thought I helped but no luck, that's the only thing that I didn't change on mine so I figured that was it. Like I said before I didn't have this problem until the intake was changed and good luck finding out what the problem is.