so i been reading a lot on rx7 have a tendency of flooded and losing compression.

when i turned my car on this morning and couple mornings [cold mornings] ago it hasn't been revving up to 3000rpm like it should be.

only goes up to 1500 and stays there!? is that normal are my seals about to go ?

or am i getting too much fuel in my housing..?

When do i know the lost of compression has happened
thanks

 

when you mean it stays at 1500, it stays there all the time? Even when warmed up?

If it takes a long time to crank the car to start, it usually means that the compression is very low.
You will know you lost compression when the engine wont start.
You can try a compression test if you want to be very sure.
If you search the forum there are countless threads on the procedure to do it.

 

Are you starting with the car in gear?
That will disable the 3k rpm Accelerated Warmup System (AWS) and the cold idle will default to @1200-1500 rpm.

If you're starting neutral and it's not revving to 3k, you have a problem with the AWS system (although why you'd want to rev a cold engine to 3k is beyond me anyway), not with the engine internals.

 

the aws is a useless system, unless you have the factory cats installed, even then, the potential for warping from a cold engine start is not worth it.

 

the car is pretty much stock from the engine to the body. so the exhaust is stock.

i thought it HAD to rev up to a 3k rpm but its just a system to warm it up and not needed than im not too worry.

i got the car with 180,000 miles so idk what to except so far no signs it going back on me. just worried if the seals go.

so basically when i turn it on cold just give it 10min til it reaches operating temp.

 

I actually lost my seals on my rear rotor just got done rebuilding the thing. Like they said above the car won't start if you lost a seal. Although I was able to start mine but it was very hard to and not suggested. Your 1500 rpm problem sounds very similar to when I lost a seal I could get the car started but would not go past 1500. Also my engine had 185,000 on it when it went. Check your compression there are all kinds of posts on how, check out the archives. Aaroncake has a great tutorial on his site with sound and everything. I however just removed one lower sparkplug and turned over the engine a few times you should hear a psh psh psh if you don't you lost a seal check the front and rear.

 

okay sounds best if i do run a compression test. Do you think its best if i spend the money and get a Mazda compression tester or an reg one should do that job ?

Yea i can feel it when i turn it on that have that power like it use to.
i was worried it was going to flood up.

at times it would barely hit 2k rpm but than go back down once that (AWS) was on.

that AWS is that a ECU like think or a motorized...or fuse somewhere i can chk out ?

 

Use the link below. Page 3 item #21 in the diagram is the AWS. Go to page 41 in the same link for instructions on how to check the AWS.

http://www.teamfc3s.org/main/factory..._non_turbo.pdf

 

That guy misunderstood your post. He thought your car won't rev past 1500 at all.

It sounds like your AWS is flaking out. Unless you're OCD, don't worry about it. It's useless.

If you still want to know your compression all you need is a piston engine comp tester.

 

alexdimen :Thanks, yea that's what i meant. I thought it was something serious cause i know these cars have that system, wasn't too sure if it was mandatory to always rev up at 3k, during start up.

satch : great man! ima read up on that.

Toxindude: yea it passes 1500k , when i drive and rev here and there but when i first turn it on it does always go to the 3k warm stage. but i will keep that in mine in case it does happen. Nd will consider doing the compression test anyways, car has 180,000 miles so never know. Thanks dude.