lenny

i am replacing my vacuum hoses, and I have been following the diagrams from my workshop manual. However, i have found a couple of differences (which might be the cause of my boost problems).

please look at this diagram (the problem areas are circled in green)

http://www.neoplatinum.com/~lenny/im...osetrouble.gif

first problem is that i am missing the top hose out of the 4 that connect from the solenoid rack to the intake manifold. i think this has something to do with the egr valve. the intake manifold doesnt even have a place for this hose to go, and it is capped off on the solenoid rack. I read somewhere that the foreign vacuum hoses were different cause they didnt have an egr valve, is it possible that I have a foreign engine??? is there a way to tell by looking at the serial number?

the other problem is that I am missing the 2 check valves that are circled in the attached picture

i went to my local mazda dealer, but they couldnt figure out what check valves I needed... maybe one of you guys could tell me what part number these are and if i need them or not.

TIA

Flybye

I've purchased generic one way valves at Napa and have NEVER had a problem with them a far as life span is concerned. Had them on my FD for over 2 years and they still work great, and the biggest plus about them is that they cost about $2-$3.

It's possible someone simply removed the EGR valve and never botherd to put it back in.

Sled Driver

iTrader: (9)

The check valve to the pressure chamber is very important & is probably why your having some boost issues. The egr check valve isn't nessary, just cap off all the hard line ends. that way, in the future, you'll know if any lines blew off.