2003 mazdaspeed i need help!!!!

[jasonga30224]

Hey i have a 2003 mazdaspeed and i just finished putting a new engine it but it misfires(skips) until 3000 rpms then runs fine if anyone knows what this problem is your help is appreciated.Oh and the engine ran great at the junk yard.

Things i've changed.

spark plugs
spark plug wires
coil packs
cam sensor
crank sensor
tps
injectors

[jonspeed3]

new car, protegays are weak sauce.

[PunjabiPlaya]

i'll +1 that

[jasonga30224]

Originally Posted by PunjabiPlaya i'll +1 that

Well maybe after i fix it

[Brian MP5T]

Originally Posted by jasonga30224 Hey i have a 2003 mazdaspeed and i just finished putting a new engine it but it misfires(skips) until 3000 rpms then runs fine if anyone knows what this problem is your help is appreciated.Oh and the engine ran great at the junk yard. Things i've changed. spark plugs spark plug wires coil packs cam sensor crank sensor tps injectors

You have checked and done everything I would have suggested..

Is it simply running like shit until 3000 or is is really running like shit until 3000

Is it bucking and do you have a WB02... If so, does it run full lean when this happens?

[jasonga30224]

Originally Posted by Brian MP5T You have checked and done everything I would have suggested.. Is it simply running like shit until 3000 or is is really running like shit until 3000 Is it bucking and do you have a WB02... If so, does it run full lean when this happens?

What is a wb02?and it really runs like shit before then and it takes forever for it to get to the 3000 mark.

[Metal409]

I'm going to guess wb02 means Wideband O2 sensor.

[Brian MP5T]

My P5 did something wierd some times..

I had a WBO2 sensor and could see what was going on, when I accelerated, it woudl for no reason gototally lean and I would get no power. Eventually I noticed that the MASS-AIR had a loose wire on the connector.

I'm not saying that this is your problem, however if you had a WBO2 you would be able to see what is going on and what the cause is.

[jasonga30224]

Originally Posted by Brian MP5T My P5 did something wierd some times.. I had a WBO2 sensor and could see what was going on, when I accelerated, it woudl for no reason gototally lean and I would get no power. Eventually I noticed that the MASS-AIR had a loose wire on the connector. I'm not saying that this is your problem, however if you had a WBO2 you would be able to see what is going on and what the cause is.

Which is the wbo2 under the car or at the header

[Brian MP5T]

Neither...

The Stock ones are both NB02..

I was just asking because if you did have one installed it would be interesting to hear what it was reading when you were below 3000 RPM.

[jasonga30224]

Originally Posted by Brian MP5T Neither... The Stock ones are both NB02.. I was just asking because if you did have one installed it would be interesting to hear what it was reading when you were below 3000 RPM.

Oh ok im not sure i just got the car so i dont know what it has on it,how do i tell if it has 1?

[Brian MP5T]

Im guessing that you don't

So, I am guessing that the motor ran well until it needed to be replaced.

It is possible that what is going on now could have caused the engine to fail.

What was wrong with the old engine?

[jasonga30224]

Originally Posted by Brian MP5T Im guessing that you don't So, I am guessing that the motor ran well until it needed to be replaced. It is possible that what is going on now could have caused the engine to fail. What was wrong with the old engine?

The guy that had it before me ran it without oil and it started knocking,but the engine i have now ran perfect at the junk yard but now that its in my car its acting this way,it ran still without this problem when it was knocking.

[Brian MP5T]

As stupid as this sounds.. at this point I would start swaping parts.. you have already done that.. so I am at a loss.

Check over all wires and connectors. Check the ,master ground, without it, the spark is not able to easily manifest.