cx-7 and problems

[tomkit]

I've driven 1,700 miles and have had no problems. Are there any older CX-7 owners with higher mileages? Have you had any problems?

[080669]

check the Check Engine Light (http://www.msprotege.com/forum/showthread.php?t=123637573) thread. I believe 3 folks have reported a check engine light caused by a "leaky detection pump" in the exhaust system, and 2 have reported a check engine light caused by a loose gas cap.

[G-Papi]

3100 miles and everything works like it's s'posed to.

[Tequila Cat]

I've got 3800 miles and the only problem I have is that it keeps getting dirty:)

[the black one]

I've got 3500km I have problem with HID headlight one side is little yellower than other..

[chrisvong]

no problem at...all !!! (beside the aftermarket hid kit I put in..sigh)

btw, I have ~2000 miles on it already

[Longhaul412]

I've driven 1,700 miles and have had no problems. Are there any older CX-7 owners with higher mileages? Have you had any problems?

Got 4,500 on my CX-7. Had an issue early with the check engine light, details in that thread. Fixed quickly, no other issues at all.

[RaiderMP5]

just bought last night, with 683 dealer driven miles. Drove to dinner and home after, no problems so far!

[Otto]

Got about 1600 miles on mine... half of those were put on by the dealer (kinda sucks but I got a decent deal). No problems so far, except I found the remote start doesn't work - it'll start the sequence but the car never starts. I'll ask about it the next time I'm at the dealer.

[cruzdreamer]

Got about 1600 miles on mine... half of those were put on by the dealer (kinda sucks but I got a decent deal). No problems so far, except I found the remote start doesn't work - it'll start the sequence but the car never starts. I'll ask about it the next time I'm at the dealer.

The salesman showed me how they screwed up on that remote start...gotta get new chips for it or something...it's wrong. Dealer should know it needs to be redone. Good luck! If you hold it in the car it will work.....hee, hee.

[1Sleepy93]

1060mi in the 2 1/2 weeks my wife and I have had it.(eek2) No real problems to report but have had an issue with the IC experiencing heat soak a couple times while driving around town.

[G-Papi]

How does that show up?

[1Sleepy93]

How does that show up?

You'll get some detonation and then the ECU will pull the timing back if you don't let up a little.

[G-Papi]

Not good. Are you burning 93 octane?

[1Sleepy93]

Not good. Are you burning 93 octane?

92 is as good as it gets here unfortunately.

[va_cache]

I thought 91 was the recommended minimum. So 92 should be good.

[G-Papi]

You are right. But here's the rub. Basically this is a MSP6 motor. It has the same (9.5-1) compression ratio. Mazda recommends 93 octane for the MSP6, and warns of power loss (ECU induced) if a lower octane is used.

What's the difference that would allow for a lower octane, or has Mazda misstated the recommended octane for the CX-7.

See the MAZDAUSA page for MS6
http://search.netscape.com/ns/boomframe.jsp?query=mazda+cx-7+recommended+octane&page=1&offset=1&result_url=redir%3Fsrc%3Dwebsearch%26requestId%3D6 5c20448fba225db%26clickedItemRank%3D3%26userQuery% 3Dmazda%2Bcx-7%2Brecommended%2Boctane%26clickedItemURN%3Dhttp%2 53A%252F%252Fwww.mazdausa.com%252FMusaWeb%252Fdisp layPage.action%253FpageParameter%253DmodelsSpecs%2 526vehicleCode%253DMS6%26invocationType%3D-%26fromPage%3DNSCPToolbarNS%26amp%3BampTest%3D1&remove_url=http%3A%2F%2Fwww.mazdausa.com%2FMusaWeb %2FdisplayPage.action%253FpageParameter%253Dmodels Specs%2526vehicleCode%253DMS6

GOTO the Specs tab

[RaiderMP5]

According to the fuel door sticker on my CX-7, Premium Fuel Only.

[G-Papi]

I just looked at the MAZDAUSA site, and the recommendation is 91 octane there for the CX-7. The MSP6 spec page recommends 93, with an asterisk footnote warning that 91 and 89 can be used mut may aggect performance.

Like I said, it doesn't make sense to me.

[Otto]

I believe I read somewhere that one of the reasons for the CX-7 having ~30 fewer HP than the MS6 is that it's tuned to run on 91 octane fuel. Compression may be the same, but the boost is lower on the CX-7, I believe.

Anyway, the manual clearly states the it requires a 91 octane so a 92 should be fine. If you get a lot of detonation, I'd recommend taking the car to the dealer. Also, make sure to buy gas from reputable gas stations.

[1Sleepy93]

I'd definately take it in if it was a lot or more than it was the short two times it has happend but it hasn't and seems to be an intercooler issue. Oh the joys of having a top mount with a little duct for air.

99% of the time I get my gas at 76.

[Mazda3]

The CX-7 has a smaller turbo which spools up faster. It makes maxiumum torque 500 RPM sooner than the MS6 to get the heavier vehicle off the line quicker and to reduce any added turbo lag with the auto tranny. The MS6 manual states 93 octane recomended, 91 acceptable. My guess is that the bigger turbo making 30 more HP and holding boost 500 RPM higher is the reason for the 93 octane.

[Mattman3234]

Well, I had my first problem. Only had the car a week (love it by the way!) (Copper red, AWD, GT, Lux package) and my upgraded Bose system would stop playing CD's. Would be listening to one, get out of the car, get back in a little bit later and it would freeze and do nothing. Could switch it to radio but that was it. Tried restarting the car couple of times..nothing...then a couple of hours later it was like nothing was wrong. First time didn't think to much of it, but then a it happened a few days later. Dealership is ordering me a new one....oh well

[tomkit]

3000+ miles and no problems yet besides the ding/dent i got recently. when i brought it into the shop they fixed it nicely, but made another ding/dent in another location ><

[RaiderMP5]

My back up camera broke at 1100 miles, 2 weeks of ownership. Gotta wait 3 weeks for a replacement, as nobody stocks parts yet.

[spike blue]

The CX-7 has a smaller turbo which spools up faster. It makes maxiumum torque 500 RPM sooner than the MS6 to get the heavier vehicle off the line quicker and to reduce any added turbo lag with the auto tranny. The MS6 manual states 93 octane recomended, 91 acceptable. My guess is that the bigger turbo making 30 more HP and holding boost 500 RPM higher is the reason for the 93 octane.

i wonder if i can put the ms6 bigger turbo in the cx-7 and the ms6 ecu??

[Z_Monzter]

My back up camera broke at 1100 miles, 2 weeks of ownership. Gotta wait 3 weeks for a replacement, as nobody stocks parts yet.


How did this happend.

[BobD]

i wonder if i can put the ms6 bigger turbo in the cx-7 and the ms6 ecu??

It was reported in at least one magazine that one of the reasons for the reduced HP was to reduce the load on the automatic transmission

[cx-7_racer]

can you put a ms6 tranny in a cx-7?

[Otto]

can you put a ms6 tranny in a cx-7?
You can do almost anything to any car. All you need is money, lots and lots of iit, usually (lol2)

[1Sleepy93]

i wonder if i can put the ms6 bigger turbo in the cx-7 and the ms6 ecu??


The MS6 ECU wouldn't control the auto tranny so that's kinda out but who is to say we couldn't just steal the map. Not sure about the turbo but I'll wait till ATP finishes the GT28 upgrade for the MS6.

It was reported in at least one magazine that one of the reasons for the reduced HP was to reduce the load on the automatic transmission

Yeah I read about reducing the load on the tranny as well but then someone posted on this board that our tranny is rated for a good deal more then the 2.3 is currently dishing out.

[G-Papi]

5k and no problemo . . . . Did hear the click when shifting from park to reverse one morning. Will get the TSB fix next time in, but it's really not a problem if you let the engine idle down after the cold start, prior to shifting. Ordinarily, I would do that anyways.

[Mazda3]

The purpose of the smaller turbo was that it spools up faster making max tq 500 RPM's lower to get the heavier CX-7 moving. The bigger turbo would create more of a lag situation. I think when CP-E comes out with their CAI, BOV, and downpipe it will give us all that 30 HP boost we are looking for.:)

[cruzdreamer]

Do you have to make sure the engine in a turbo is warm before shutting off?? My RX 8 is like that.....it won't start again if you shut off the car and the engine was cold. I hope I don't have to worry about this with a turbo engine. Thanks for your help.

[02589]

removed

[1Sleepy93]

You can shut off the motor hot or cold. Doesn't really make a difference to it seeing as it's basically your normal every day 2.3L Mazda motor that's just a little more stout with a turbo and direct injection tacked on.

The thing that you do need to be more mindful of is cooling the turbo if you've been flogging it a bit. That just requires about 30 seconds of idling while stopped.

[TheMAN]

Do you have to make sure the engine in a turbo is warm before shutting off?? My RX 8 is like that.....it won't start again if you shut off the car and the engine was cold. I hope I don't have to worry about this with a turbo engine. Thanks for your help.

if a rotary engine is still cold, you need to rev it to 3000rpm and hold it there, then shut it off while it's still at 3000rpm... this is to keep the spark plugs from fouling

[mpf1v3]

what do u mean the rx8 rotary wont start again if u shut it down cold?? why? and is it a problem that fixes itself overnight.. or do u have to take it to dealer or something if it happens?

[TheMAN]

the plugs get fouled because when the engine is cold it runs rich... just shutting it off at idle will make that happen...
thats why you HAVE to shut it off at 3000rpm... rotaries have a hard time starting cold to begin with, that's why you have to do extra shit... it's not like a piston engine where it will run pretty much whenever and after whatever you do to it

[cruzdreamer]

if a rotary engine is still cold, you need to rev it to 3000rpm and hold it there, then shut it off while it's still at 3000rpm... this is to keep the spark plugs from fouling

Yep, you are right and I always be sure and do that!

[cruzdreamer]

what do u mean the rx8 rotary wont start again if u shut it down cold?? why? and is it a problem that fixes itself overnight.. or do u have to take it to dealer or something if it happens?

I had it towed to the dealer once since my hubby in the beginning of ownership pulled in and out of garage and it never was driven that day, therefore, never warmed up. Their emergency start method did not work. In winter I just hold it and rev it at 3000rpms and let it run for a couple minutes before shut off. Sounds a little crazy I know but it's rare you ever have a cold engine.

[cruzdreamer]

Thanks for contributing your knowledge about the cool down guys! Sure helps!