Help!!

[lopey4.6]

I'm not sure about this but I don't think you can run a 99+ cam on a pre 99 block. Even if you have 99+ heads. You may want to call Comp Cams on that. because you could of possibly bent valves and that will make you loose power. Good luck.

BTW how is your car running Mogs?

 

[lopey4.6]

I'm not sure but I don't thik you can run a 99+ cam on a pre 99 short block even with PI heads. You may want to call Comp Cams on that. Because if you bent valves then you will loose power. Good luck.

BTW how is your car running MOGS?

 

[tomustang]

http://phatdoggy.home.comcast.net/sohc_timing.htm should help you with the cam timing. check if you can rotate the crankshaft.

lopey4.6 - yes you can.

 

[FallenPhoenix]

I'm not sure about this but I don't think you can run a 99+ cam on a pre 99 block. Even if you have 99+ heads. You may want to call Comp Cams on that. because you could of possibly bent valves and that will make you loose power. Good luck.

BTW how is your car running Mogs?

The cams are in the heads, there's not even enough difference in the blocks to bother with, much less mess with cams.

 

[lopey4.6]

Well in pre 99 blocks there is less of a dish on the piston, hence the higher compression after a head swap. I know for a fact that the XE270's have PTV contact on a 99+ engines. So why do you think Comp offers different lifts for Pi and non PI?

 

[FallenPhoenix]

Well in pre 99 blocks there is less of a dish on the piston, hence the higher compression after a head swap. I know for a fact that the XE270's have PTV contact on a 99+ engines. So why do you think Comp offers different lifts for Pi and non PI?

oh ok, that makes more sense. I thought you were talking about the block itself. Guess I didn't think enough, story of my life lately

 

[TNstanggurl]

help

Hey guys the car is running normal again,but still odesnt have any extra power.Last night when we floored it at 50 it died on us twice!Do you guys have any clue what could be wrong?Would it run this normal if it was out of time?Also the check engine light is on

 

[tomustang]

have the codes pulled at Autozone for free. then you'll get closer in finding out what's wrong. double check your plugs and all electronic connections too

 

[TNstanggurl]

thanx

Thanx for all of your help guys

 

[RysRed96GT]

as long as everything is hooked up and IS TIMED RIGHT, then you should really feel the extra power.

did ur b/f torque the heads down in the correct sequence and torque specs? u use new bolts?

lopey4.6, how can u say the 99+ cams wont work on pre99's? thats what all us headswapped guys do

 

[TNstanggurl]

...

He did everything like the haynes manual said do.I guess we are going to get his buddy to advance the timing and give it a good dyno tune,but i didnt want to do that until i got gears,pullies,tb and plenum.Oh well but thanx for all of your help!!

 

[RysRed96GT]

dont mess with the timing or tune until you get the codes pulled. you should feel a big difference even untuned. dont put on bolt ons yet either until u get it working fine.

pull the codes at autozone and post them here. dont add more variables you'll have to factor into fixing the problem

 

[TNstanggurl]

check engine light

Well,we took it to autozone and found out that the reason whay the ce light is on is becasue we dont have the temp sensor hooked up.We knew that was onme reason why it was on but we were just curoius if it was anything a little more seroius also.We are getting a gauge soon to fix that.Besides that the car hsa been running just like it was before the swap,normal but no extra power.The crank and the cams are in time together its just that the crank is a few degrees retarded.So i guess we are going to take it to my b/f's buddys to get it in time.We dont feel like messing with it anymore.It si still kind of odd to me that it just stalled like that last night after we floored it.....hmmmm. But thanx again for putting up with all of my complaining and stupid ?'s.

 

[RysRed96GT]

thought u said ur b/f did everything by the haynes manual? how do u know the crank link is off? that would make sense why you dont feel the power...

 

[saxman9801]

Doesn't the computer use the temp of then engine to determine when the engine is warmed up and go from there to control the engine parameters, I thought there was a set table it used until it was warmed up, no temp sensor the computer does not know what to do since it does not know how warm the car is, I dunno maybe i'm on crack. Dan

 

[RysRed96GT]

Doesn't the computer use the temp of then engine to determine when the engine is warmed up and go from there to control the engine parameters, I thought there was a set table it used until it was warmed up, no temp sensor the computer does not know what to do since it does not know how warm the car is, I dunno maybe i'm on crack. Dan

yeah, but depends which one. the one on the drivers side goes to the EEC. the pass side goes to the gauges on 96-98's.

 

[Dan_Soprano]

Doesn't the computer use the temp of then engine to determine when the engine is warmed up and go from there to control the engine parameters, I thought there was a set table it used until it was warmed up, no temp sensor the computer does not know what to do since it does not know how warm the car is, I dunno maybe i'm on crack. Dan

The ECU uses the coolant temp sensor to determine when the coolant (hence engine) is the proper temperature to go from "open loop" to "closed loop" operation. Even if the ECU was stuck in open loop operation, it should still not effect the performance as badly as she is describing. If the timing is retarded as much as she says it is, then that will SEVERLY hamper the performance. 1 degree of timing = 4hp. so say she has the timing retarded 4 degrees, thats roughly 20 hp loss. Plus the extra lift and duration she has from the Cam, that makes for even more of a loss due to the fact that the flame front of the igniton never really gets to fully burn the air/fuel mixture totally. Cheryl, MAKE SURE you get a tune done before you go romp on the car. Your compression ratio is going to be SKY HIGH with the addition of the PI Heads on you pre-99 block. Remember.......detonation WILL KILL your motor faster then anything else will.

 

[RysRed96GT]

im just gonna say this. you dont NEED a tune. my car runs perfect, untuned! no detonation or anything. idle's perfect. power is all there. still a night and day difference than before. i've romped on it hundreds of times since i did them and no problem at all. i have 119K miles on my block and about 30K miles on the heads.

 

[NasaGT]

I would listen to rysred - a tune is not needed for this setup to feel like it has more power. It may not idle well with the new cam, but it should be stronger. Something is wrong, fix it before you waste time on a tune.

 

[TNstanggurl]

reply

Ive never heard of a pi swapped mustang not noticing a pretty big difference before a tune.A tune would only add about 15-20 horsepower anyway.I have been around here a few times when my b'f's brothers car was out of time and it ran just like mines running.He did a full top end rebuild to his nova and it was out of time but he took it to his buddy and he fixed it and it was a ****load faster.I dont know maybe i was on crack too But the car seriously doesnt have any extra power than from before we did the swap.