intake manifold change
 

i have a stock intake manifold from a 04 Mustang GT, it is a brand new OEM product, aluminum crossover.
picture: Attachment 18312



now, what would i have to do in regards to modification to get this installed on my car? my stock manifold has a crack, and the JB weld cracked, and i am getting sick and tired of it. if there are any write-ups about this, can you link me? or is this a straight swap? because i have the Chiltons book for the 1998 Mustang GT.

Its a pretty straight forward swap. Just need to put some extra silicone on the gasket/head and it will bolt on.

This is a pretty good write up.
http://www.americanmuscle.com/pi-intake-install.html

thanks, spike. :) exactly what i needed.

You stated that your new manifold is from a 2004 model. It will not fit your 1998 engine unless you have done a PI head swap. Ford changed the heads in '99 and that's what the PI heads are. Stock '99 to '04 heads. The intake ports are completely different.

did you look at the write up? it shows the intake ports on the PI heads VS the NPI heads. need some extra silicone around the seals to make sure there are no leaks, like the coolant tube into the head. the bolt spots are in the same spots, but the intake ports are bigger. i have to get a new coolant tube that goes inside the V of the engine block. there is only one sensor hole in the crossover, the NPI has two for the coolant sensor. i already have a coolant light on, i am suspecting the sensor went bad, so i am gonna just not run the coolant sensor. it is possible, you just have to use the PI head gaskets and add silicone to extra places to make sure it seals.

DO NOT just run 1 sensor. You will end up causing more damage to the motor that way.....Trust me (experience)

Yeah, what he said. If you're talking about the coolant light on the dash, that just tells you its low. If I remember right, the sensor on the drivers side is for the ECM and the other passenger side is for the temp gauge.

Get some NPI adaptor adaptor plates. You will have a major port mismatch otherwise. You may get it to seal but you will not see any performance benefit of the PI manifold unless you have matching ports.

logan motorsports sells the kits if i remember right.

the main reason i want to put in the manifold now is because the one i have is cracked, and i go through Antifreeze like nobody's business. i will worry about performance gains when i put my PI heads on. :)

The coolant light is connected to the sensor in the resevoir tank. That one can be left unplugged with no problems....The ones on the intake itself can't. Contrary to common belief both sensors are connected to the ECM. (unplug one or the other will trip a MIL light, unlike the one on the resevoir) I have heard thru a reputable tuner that the ECM takes readings from both sensors and adjusts fuel, timing, and the cooling fan.


My experience was leaving the driver's side unplugged, and this caused the cooling fan to run on HI mode all the time (which caused me to buy a new one after the bearings siezed do to the fact the old one was being run at full tilt all the time.) Not only did that happen, but the motor was running dangerously lean, do to the fact the ECM had pulled timing and fuel, to compensate for the loss of that one sensor.

You can drill and tap the manifold for the other sensor its no big deal to do it. Or I wonder if you can just wire the other sensor into the one sensor and just let them both read for that same temp sensor like the 99-04 cars with one sensor.

They see some nice gains just from swapping that manifold over.

I have mine running of a Y adapter. It works fine, and have no problems with the ECM. As long as both sensors are in coolant, you will be ok.

No you cannot hot wire it like that...The amperage that the sensors send to the ECM is different....

That is what I was worried about. Like said though drilling and tapping a hole is no big deal.