Pi intake swap PROBLEMS!! HELP!

98blackstallion · Jul 14, 2005

ok guys i finished my PI intake swap this morning and everything went together smoothly. Here is the problem I have a severly miss fire after the swap and when I start it up my car stays at over 2000rpms for 10-20 seconds.It also hangs in the rpms longer than it used to like when i rev it to say 2500rpms it takes forever for it to idle back down. THe miss fire seems to be getting better the longer i have the battery connected and more run time it has on it. Guys what could it be? I have a check engine light on also but i think that is because i dont have the second temp sensor pluged in because I have to tap it into the side of the block. As my Pi intake doesnt have the aluminum crossover for me to tap it into. Could this sensor be causing my problems?

98blackstallion · Jul 14, 2005

tomustang · Jul 14, 2005

Get the codes. Go to a hardcware store and buy a T fitting and hook both temp sensors up to it. Also check to see if there's any sparks (in the dark) comming from any of the wires.

giddiupstang · Jul 14, 2005

Make sure you have your spark plug wires connected to the right plugs. I had a similar thing happen to me when I changed out my intake on my 97 GT. It was misfiring really bad and the exhaust pipe right before the last cat got red hot. Took it to Advance Auto, to have the codes read(check engine light was solid for a few min, then it started to flash then solid).. Cant remember the code exactly, but also stated misfire. After he told me to check the plugs, I switched the wires on the last 2 plugs next to the firewall on the driver side and the car ran like brand new.

98blackstallion · Jul 14, 2005

I switched out the wires with MSD super conducters so I might have gotten one misplaced but i did only one wire at a time. IT acts as if it tries to bog down and out.

MyEarsHurt · Jul 14, 2005

You have to plug in the second temp sensor, and now that the intake is on that could be more difficult. You will either need to find a t-fitting for the sensor, or take off the intake and drill and tap a hole for the sensor. I dont think thats the idle problem though. Make sure everything is tight, it sounds like a air leak somewhere. I had a few loose bolts from tb to plenum once and my idle was FUBAR. So try tightening everything up (dont snap any bolts though) and fix that temp sensor then tell us what happens.

kuma · Jul 14, 2005

No you do not need to plug in the second sensor. Well, actually it depends on which sensor the second one is. The temp sensor on the passenger side is for the temp gauge only and the sensor on the driver side is for the computer and must be installed.

Bozu

MyEarsHurt · Jul 14, 2005

kuma said:
No you do not need to plug in the second sensor. Well, actually it depends on which sensor the second one is. The temp sensor on the passenger side is for the temp gauge only and the sensor on the driver side is for the computer and must be installed.

Bozu

Exactly, and the one on the driver side is the one that he doesnt have plugged in...so he needs to plug it in!

98blackstallion · Jul 14, 2005

yeah its the driver side that isnt plug in. I went and had my codes checked and it came up as one too and thats all i codes I had. Could the car be running lean? I really hope not cause I dont have the money for a tuner. Could the TPS sensor cause these problems?

Joel's98GT · Jul 15, 2005

1. get everything squared away with the temp sensor first, should have ponied up a couple bucks for the aluminum version.

since it is too late for that, Tap the Goose neck above the thermastat, it's been done before.

98blackstallion · Jul 15, 2005

I got this Pi intake for only a $95 bucks. But I am taking care of the sensor this morning and changing out my plugs and cleaning my TPS

98blackstallion · Jul 15, 2005

Joel,

Do you mean the thermastat housing?

Turbo92PGT · Jul 15, 2005

He means the Thermostat housing, you're right. But what is the best and least destructive way is to get the brass/alum "T" for plumbing pipe. As far as your problem. It could be a number of things. First get all of your sensors connected. What gaskets did you use for the swap? PI or NPI? I used PI with some RTV around the coolant ports. Works awesome. You might possibly have a slight coolant leak into the head. Did you replace the spark plugs when you did the intake? Might be a good idea to try. I had all sorts of trouble with mine. Especially when the intake cracks and starts leaking. Then water gets in the plug holes and fouls them that or makes your wires arc. When you have the sensors connected and new plugs in. Pull the negative off and put your foot on the brake for 30 seconds. Then reconnect. Before you do this check and double check all the sensors and possibly retorque the manifold. Then start it up and let us know how it works. My car ran absolutely HORRIBLE when i did the swap. I was like "UHH OH wtf did i just do". Then I reset the computer and it hauled ass. Crazy how that works. Haven't had any trouble since.

98blackstallion · Jul 15, 2005

ok the thermostat housing idea wont work because the metal is to thin. The place for a temp sensor on the side of the block is located way to close to the exhaust for my tastes. So my last opinion is the "t" thing. Were I "t" the drivers side temp sensor into the pass side one. What kinda of 'T" am I supposed to use??? Is it metal or is it wiring i have no clue someone PLEASE help me out here....

tomustang · Jul 15, 2005

Snip the plug and bring it to a hardware store and find a pipe T fitting. See which one fits I think it's a 3/8in or so. you'll get the picture.

MyEarsHurt · Jul 15, 2005

Its a better idea to just tap the intake, but do what you like. If you are getting a lean code, then something probably isnt tight enough, either the intake bolts that bolt to the heads, the tb to the plenum, the plenum to the intake, one of those probably isnt tight enough and so you are getting more air into the intake than needed.

Mike97gt · Jul 15, 2005

ok things too check on with your symptoms.

1. check the spark plug holes. . these LOVE too fill with coolant and will cause a hell of a misfire when done. the misfire is probally why you are getting lean codes. 02 sensors only pick up oxegen so when a cyl misfires and releases unburned fuel and oxegen into the exhaust the 02's pick up the unburned oxegen and think that bank is lean.. the 02 NEVER SEES THE UNBURNED FUEL OF A MISFIRE ONLY THE OXEGEN

so clean the hell out of those plugs and the holes them selfs. make sure the plugs are dry. and then check the ends of the plug wires.

2. if above does not fix it make sure you got all the vac lines pluged in.

ok last is not related too your problems..

MAKE SURE TOO BLEED YOUR COOLING SYSTEM.. many people on here have blown headgaskets by driving around unbled...

kuma · Jul 15, 2005

Why don't you just take out the first temp sensor and hook up the "second" temp sensor and drive around with that. The first temp sensor is for the gauge in your dash so you can probably do without that for a bit. With the second temp sensor hooked up you can see if the problems go away.

Bozu.

98blackstallion · Jul 16, 2005

ok i decided to plug the driver side sensor into the block and everything is great now. No more problems at all. Thanks for all your help guys. This thing really pulls above 5k now.

Joel's98GT · Jul 16, 2005

98blackstallion said:
ok i decided to plug the driver side sensor into the block and everything is great now. No more problems at all. Thanks for all your help guys. This thing really pulls above 5k now.

Pi intake swap PROBLEMS!! HELP!

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