Help please!
#1
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Help please!
Hi everyone! im really worried and i would really like some help. I took imy 2004 rx8 for a compression test at the dealership and this are the results. Im not a rotary expert and i really need advice on my situation here are the results. thanks in advance for the help
ROTOR 1
KPA
570
580
590
AT 250 RPM
ROTOR 2
530
560
560
AT 250 RPM
JUDGMENT OF ENGINE COMPRESSION BY MAZDA
ROTOR 1
NOT GOOD
NOT GOOD
NOT GOOD
ROTOR 2
NOT GOOD
NOT GOOD
NOT GOOD
ACCEPTABLE LEVELS (AGAIN BY MAZDA)
830 STANDARD
680 MINIMUM
MAZDA RECOMMENDED A CARBON REMOVAL PROCESS TO RE-STORE COMPRESSION AND THEY ALSO SAID THAT THE SPARK PLUGS WERE FOULDED.
MAZDA WARRANTY AT LEAST HERE IN CANADA SAYS THAT EVEN WHEN MY CAR DIDNT PASS THE COMPRESSION TEST I NEEED TO THE CARBON REMOVAL FIRST AND THEN 1 MORE COMPRESSION TEST. AFTER THAT IF THE CAR DOESNT PASS THE TEST THEN THEY WILL DO 1 MORE VACUUM TEST OR SOMETHING LIKE THAT IF THE CAR DOESNT PASS THAT ONE I GET THE NEW ENGINE. IS THAT THE WAY IT GOES? I REALLY NEED SOME HELP THANKS ALL
ROTOR 1
KPA
570
580
590
AT 250 RPM
ROTOR 2
530
560
560
AT 250 RPM
JUDGMENT OF ENGINE COMPRESSION BY MAZDA
ROTOR 1
NOT GOOD
NOT GOOD
NOT GOOD
ROTOR 2
NOT GOOD
NOT GOOD
NOT GOOD
ACCEPTABLE LEVELS (AGAIN BY MAZDA)
830 STANDARD
680 MINIMUM
MAZDA RECOMMENDED A CARBON REMOVAL PROCESS TO RE-STORE COMPRESSION AND THEY ALSO SAID THAT THE SPARK PLUGS WERE FOULDED.
MAZDA WARRANTY AT LEAST HERE IN CANADA SAYS THAT EVEN WHEN MY CAR DIDNT PASS THE COMPRESSION TEST I NEEED TO THE CARBON REMOVAL FIRST AND THEN 1 MORE COMPRESSION TEST. AFTER THAT IF THE CAR DOESNT PASS THE TEST THEN THEY WILL DO 1 MORE VACUUM TEST OR SOMETHING LIKE THAT IF THE CAR DOESNT PASS THAT ONE I GET THE NEW ENGINE. IS THAT THE WAY IT GOES? I REALLY NEED SOME HELP THANKS ALL
#5
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So if he must do it, might as well take advantage of the good deals around anyways.
#6
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Thanks for the help guys! any ideas on how effective the mazda zoom zoom clear is? would it bring all the pressures back up? and if it doesnt work and they need to do the intake vacuum test would i have any problems with the AEM cold air intake that i have in the car? thanks again
#8
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Not true.
Installing new spark plugs will not increase compression numbers. One of the plugs is removed from each housing during the tresting procedure, anyway. Spark plugs may be carbon-fouled but that may be a by-product of an engine that is also carbon-fouled.
Mazda does the carbon-cleaning (using Mazda Zoom Zoom cleaner) because it oftentimes does raise compression numbers and steady the intake manifold vacuum numbers, which is far cheaper than an engine rebuild.
Installing new spark plugs will not increase compression numbers. One of the plugs is removed from each housing during the tresting procedure, anyway. Spark plugs may be carbon-fouled but that may be a by-product of an engine that is also carbon-fouled.
Mazda does the carbon-cleaning (using Mazda Zoom Zoom cleaner) because it oftentimes does raise compression numbers and steady the intake manifold vacuum numbers, which is far cheaper than an engine rebuild.
#9
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Think about compression for a sec.....
There is no firing or spark event...all that happens is they put a pressure transducer in a spark plug hole and crank the engine to see how much pressure the chambers make when the engine rotates at a fixed speed
GOOD SEALS....GOOD COMPRESSION...BAD SEALS....LOW COMPRESSION
If the seals are carboned up..they get sticky and don't seal as well...that's why they try the decarbon first before they want to replace the engine
The reason for the plug replacement and coils is often a result of the most common complaint of a poor engine...lack of power.
Since the most common reason for low power is poor plugs/coils...they try that first Often without helping the problem if it is really the engine in the first place. Sometimes it is a combination problem...and the coil/plug will get the customers back to happy..even if a bit down on power ....
Last edited by dannobre; 08-20-2010 at 09:27 AM.
#10
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Think about compression for a sec.....
There is no firing or spark event...all that happens is they put a pressure transducer in a spark plug hole and crank the engine to see how much pressure the chambers make when the engine rotates at a fixed speed
GOOD SEALS....GOOD COMPRESSION...BAD SEALS....LOW COMPRESSION
If the seals are carboned up..they get sticky and don't seal as well...that's why they try the decarbon first before they want to replace the engine
The reason for the plug replacement and coils is often a result of the most common complaint of a poor engine...lack of power.
Since the most common reason for low power is poor plugs/coils...they try that first Often without helping the problem if it is really the engine in the first place. Sometimes it is a combination problem...and the coil/plug will get the customers back to happy..even if a bit down on power ....
There is no firing or spark event...all that happens is they put a pressure transducer in a spark plug hole and crank the engine to see how much pressure the chambers make when the engine rotates at a fixed speed
GOOD SEALS....GOOD COMPRESSION...BAD SEALS....LOW COMPRESSION
If the seals are carboned up..they get sticky and don't seal as well...that's why they try the decarbon first before they want to replace the engine
The reason for the plug replacement and coils is often a result of the most common complaint of a poor engine...lack of power.
Since the most common reason for low power is poor plugs/coils...they try that first Often without helping the problem if it is really the engine in the first place. Sometimes it is a combination problem...and the coil/plug will get the customers back to happy..even if a bit down on power ....
#12
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True that! You should actually feel pretty confident in your dealership. They are going the right, text book route here. I was told the same thing when I inquired about my engine. I'm not having any issues yet, but I contacted them to see what they would say. I was told that they would start by assuring the ignition system is not bad, and inquired about how new my plugs, coils, and wires were. They said they wouldn't do anything else before those were confirmed to be new or replaced. They then said they would de-carbon the engine, then replace it if necessary. Sound familiar? It should. It sounds like they know what they're doing.
Out of curiousity, what made you get your compression checked?
Out of curiousity, what made you get your compression checked?
#13
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And if you do get a "new" engine, please go fill this out!
https://www.rx8club.com/rx-8-discussion-3/rx-8-reliability-engine-data-survey-202333/
You don't have to have had an engine go bad to fill out the survey, but the more data the better!
https://www.rx8club.com/rx-8-discussion-3/rx-8-reliability-engine-data-survey-202333/
You don't have to have had an engine go bad to fill out the survey, but the more data the better!
#14
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To be honest, I dont. lol.
That's why I read a lot on here, gaining more and more knowledge to help understand my hobby. I have no mechanical experience aside from a lot of reading here and fixing the millions if issues my cars had
It's actually amazing how simple things are to repair if you have a DIY, patience, and tools
That's why I read a lot on here, gaining more and more knowledge to help understand my hobby. I have no mechanical experience aside from a lot of reading here and fixing the millions if issues my cars had
It's actually amazing how simple things are to repair if you have a DIY, patience, and tools
#15
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air pumps are air compressors and they work by moving the air to a smaller space ( compressing it) . and i got the compression test done because i bought this car without getting to much information about the cars past, the car still has power and i actually thought the engine was doing great but i really wanted to know how the engine was doing. and i know i was an idiot when i bought the car because i didnt ask for maintenance records of the car and now the retarded first owner is having trouble looking for them! and if i dont get those records mazda doesnt want to replace my engine thats why im so worried right now :S it was a stupid mistake by me