I found a screw on the throttle body that was hissing at me and I tightened it and it quit hissing like a vacum leak. Idk what the screw is , I didn't notice any difference . Also , I messed with the IACV and it fixed my rough idle , it just took a Allen wrench to tighten and loosen it
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MSP HELP! rough idle, loss of power not sure. please help
- Thread starter black n yellow
- Start date
hornsfan10609
Certified Mazda Tech
- :
- 2003.5 Mazdaspeed Protege x2
The screw is the idle air bypass screw, make sure it isn't too tight that the car will still idle but it won't fall out while driving.
i was told it could be a vacum leak mine is getting fix monday..Let me know if its the wastegate. Thanks and I don't have a boost gage. I know I have a bolt missing where the exhaust manifold bolts to the block because it broke off but the intake is real tight on there ill go through and make sure everything is on properly and check for the codes. As for the fuel cut it wouldn't have to do with the fuel filter? Just the 02 and maf reading wrong?
well if you do in fact fix the problem then let us know what it was before i buy this 1500 dollar haltech loli was told it could be a vacum leak mine is getting fix monday..
i will let you know. will update youwell if you do in fact fix the problem then let us know what it was before i buy this 1500 dollar haltech lol
korangatang
Member
- :
- 2003.5 Titanium Grey Mazdaspeed Protege
this thread totally got jacked
hornsfan10609
Certified Mazda Tech
- :
- 2003.5 Mazdaspeed Protege x2
Never heard of it before, I don't see why.Would the maf on the pressure side cause this?
Don't they all?this thread totally got jacked
black n yellow
Member
- :
- mazda/ protege/ mazdaspeed/ 2003
So I thought. My car was idling rough and driving like crap because of the whole in my cold pipe but I bought new pipes from corksport and it didn't fix the problem. Would the maf make a difference on the cold pipe? Or what other symptoms would go on if the timing belt was not put on right? Rough idle and loss of power like a lag while accelerating
Also check your exhaust manifold bolts. I replaced 2 the other day that were missing. And to my surprise I found my vacuum leak. I had been searching for. There is a line coming straight up off the throttle body that was brittle and snapped completely off. Now she is as good as new again. I also cleaned the iac valve like I mentioned earlier in yourthread. Idle improved a bit but it was the vacuum leak
black n yellow
Member
- :
- mazda/ protege/ mazdaspeed/ 2003
ill have to check the line coming off the throttle body if i can figure out which it would be. thanks
black n yellow
Member
- :
- mazda/ protege/ mazdaspeed/ 2003
i actually had two of the bolts missing and fixed them so that part is good maybe its the line?
wanting to bring this thread back to life. i replaced my egr valve today and i still have what feels like a boost leak so im stumped on this issue. i havent changed my wires and now im starting to wonder if my watesgate is bad or something. i alreday replaced my wategate actuator and it wasnt for a msp but it still works. someone on a how to thread said we could use a silvia wategate i think, so thats what i did. i also replace the intake manifold gasket, and the throttle body gasket. i need some input before i spend all money on a haltech and a tune
- :
- 2003 Mazdaspeed Protege 1660, 2004 Winning Blue RX8, 2005 Mazda6
All you people are running 20+in of vacuum... I've never read above 19hg... And that's basing it off of my boost/vacuum gauge AND a Snap-On vacuum gauge. If I turn my AC on, I'll pull 16hg. No vacuum leaks- I've smoke tested the s*** out of my car on various occassisons.
