Crash

I think I blew a seal last night I was out driving around got on taking off from a stop sign shift in to third and felt a hesitation. came to a stop at the then next stop sign idel sounds real lumpy bring it home park it in the garage check afew things outnothing I can see. hoping was fouled plugs changed those a few minutes ago still lumpy idel and when boosting the needle doesn't move smoothly any more kinda shakes as it builds up. *****.
where should I take it or what should I do total loss it right now.



mods are:
Apexi Power fc
" gt spec exhuast
" intake
" bov
downpipe
midpipe
greddy under drive pulleys

RX7Elmo

Try to read the tread about how the map sensor can make your car seem like you blew your motor.

If you have a compression testor kit, that's the thing i would check first. especially when you were changing out the spark plugs.

Did you have your power FC tuned correctly and what boost are you running??

Good luck.

ttpowerd

Try reconnecting the map sensor and if that isn't it I would do a compression test. My friend had a similar problem...ended up that he cracked a coolant seal and it only took a little more time before it totally blew

OptusX4

Isn't there sort of a crude compression test? pull the plugs, and crank, listening for pop, pop, pop... etc... Well the "pop" is the build of compression, so if it doesn't sound like a distinct pop, it isn't making good compression. If you get one pop out of several, that's indicative of a blown apex seal, whereas if you get no pops out of one rotor that's a corner/side seal, right?

jspecracer7

crude it truly is. When you check your spark plugs, first pull the EGI relay, then go the the front rotor and pull your leading plug. Have someone crank the engine over. This procedure applies to both rotors. Do one rotor at a time. You should hear 3 even "whooshes". If you get a WHOOSH-whoosh-whoosh , then your engine's blown.

RX7Elmo

you can pull either plug really, doesn't totally matter.

make sure u see about 250rpm when cranking, or the battery is still good.

you can buy a regular compressin testor kit for piston motors for 20 bucks. Just use it and hold the peak hold button down. You should see the needle jump 3 times pretty fast. Just see where they roughly were. I think you want about 120psi+???.i forgot.


danny

nocab72

What is your boost gauge reading @ idle?

K

jspecracer7

Oh yeah, forgot about that. If you've blown it, then the boost will be erratic i.e. watching a boost gauge, the boost needle will bounce up and down...not stay steady. I noticed this before and thought I blew my engine...turned out I did

GoodfellaFD3S

iTrader: (213)

I noticed the midpipe in your mods list. Is your wastegate ported? What boost do you creep to, if at all? Are you running stock injectors, and what kind of peak inj. duty cycle are you seeing at 8k WOT in 3rd gear?

Crash

Never had any boost creep had it set to .80 of a bar never took ot to 8k rpms always shifted at 7k tops won't have time to pull the plugs agian this week have three pools to build going to have to make an appiontment at mazduh and see what happens if it still has good compression (not fuggin likely) i'll have them check the coils and map sensor don't it gets past the compression check. Argh this month blows.

GoodfellaFD3S

iTrader: (213)

It would be helpful if you answered all my questions. Help me to help you

Crash

at 7k I usually seen about 88-89%. and the wastegate isn't port as far as i know Ididn't do it or have it done but I noticed when I took of the percat some had cut it open guted it and weld it back together.

mjw

iTrader: (1)

When was the last time the fuel filter was changed?

Matt

Crash

two weeks ago. It was a pita.