i serched and count find the right thread, and i knew the answer myself but forgot cuz i've been outta the rx7 game for a while, but only white smoke comes out of the exhaust but smells only like gas no coolent. goes away when warm. poping noise from the exhaust but i think that from the glass pack as mufflers (im going to get that replace as soon as i register the car).i think its a seals? o ring? sumthing i had forgot. but if some one can help thanks

 

Do you:

A. Lose coolant on a periodic basis?

B. Lose oil faster than normal?

or

C. Have really, really bad gas mileage (under 15 MPG city, give or take a few gallons...)?

 

havent really took it out like that yet. i have just bought it and its in the garage. i take it out for a drive a couple times of week, less than 3miles and need to hit the junkyard for a new speedo so miles dont work but rpm does.

 

im guessing apex seals

 

it drives fine has power everything. havnt got around doing a comp. test but yea when i was driving it back home on the freeway it was all good. oh yeah i had just remember it doesnt over heat ether needle stays in the middle.

 

ya my car did the same on cold starts cause the seals........

 

ok but i have a question....does your car have a funny throw

 

what do you mean as a funny throw?

 

Valkyrie, I have C. PM me details.

 

First, test compression... to make sure it's not apex seals (although I kind of doubt it personally).

Second, warm up the car, and clip a voltmeter to the O2 sensor (in fractional mode), ground it... this will tell you if it's running rich/lean/whatever (.45-.5 or so is good, .8 more or so is rich, .25-ish is lean)...

If it's running rich and you have good compression, you'll need to check your injectors, timing, AFM, vacuum sensor (in other words, fuel/air system) etc...

 

Well I checked the compression about a month ago and it was 100-front 110-rear.

The only type of meter I have is a multimeter.. and it have probes not clips so I'm now sure how to to that Anyway I changed the o2 sensor around the same time I checked the compression. I guess I'll figure out how to do the multimeter thing.. then go from there. Thanks.

 

Well obviously you can use the DMM in voltage mode

You can get clips at Radio Shack... although if you have a stock-style O2 sensor with the stock connector, you could just use the probe on the connector, then touch the other probe to the bolt that holds the vacuum sensor (as a ground).



Go ahead and change your water-temp sensor behind the water pump housing (need to take off the intake manifold though)... and you'd be better of checking the manifold's air temp sensor too (mine was broken when I got my car so I had to get a new one).

And use the multimeter's Ohmmeter mode to check the AFM and it's intake sensor...

 

telling people they have bad apex seals when you aren't exactly sure.

 

New speedo cable is very cheap (like $12), My gauge wasn't working either once and all it was was a bad cable. Removing the instrument panel is the hardest part of this project.

-Max