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Mazda CX-7 Starting Problems

michele_2005michele_2005 Posts: 6
edited January 2018 in Mazda
First of all I am very impressed with this site and some of the posts I have read. Bought a new cx7 2.5 months ago, about 3 weeks ago I noticed a problem that has occured pretty well every morning. When I start my cx7 it starts fine, I go to drive it down the road and it is if there is no gas coming into the vehicle. It jerks, makes a terrible noise and moves very slowly. Almost as if I was running out of gas. I pull over and put into park and hit the gas pedal a few times and within 5-10 mins it is fine.

Only happens when the car is cold...I do experience the lag I read about which I now know it is normal..I use the recommended octane gas, I do not drive hard
Made appt to bring into dealership and wonder if anyone can give me some suggestions or thoughts so I can be prepared?
Someone mentioned that Mazda engines have to be re programmed?

Thanks for your time,



  • That could be a lot of things, but it's not normal, regardless of what version of software is in the engine computer. Let the dealer figure it out - just hope they can recreate the symptoms.

  • vbbuiltvbbuilt Posts: 498
    Most unusual. I have no idea what could be the problem.

    Adding to what carlitos recommended, keep detailed records - it's wise no matter what car you own.

  • Thanks for the reply, I will start taking more detailed notes

  • :sick:
    Hi,I have exactly the same problem with my CX7.I bought the car 3 weeks ago and it happens twice so far.First they told me that they have to do some settings?!?!?!But the next day it happens again.Now it's in the service and they don't know what is the problem.Please let me know if you find something....
    Thanks a lot,
  • Will do Mike,
    I will update you in few days.
  • I had the same jerking issues with my CX-7. Ask the techs to look at the belt on the car. It took the techs in Dallas 16 days to find discover that it had nothing to do with the computer settings.

    Here's what the district manager told me:
    · The drive belt had been installed 1 tooth to engine side over the edge of pulleys, this caused the belt to be torn off at about 1/6 width (1 tooth).
    · Some pieces of belt materials and fuzz stuck/touched the crank position sensor and trigger wheel and would then interrupt the crank sensor signal momentary. (approximately 50 milliseconds)
    · The Powertrain Control Module would detect the momentary loss of signal from the crank sensor and would kill the fuel injection, which was causing the jerking.
  • thanks
  • lwdblwdb Posts: 2
    Does anyone have a problem with starting their vehicle in the cold? Bought my car a couple months ago and they said it had a block heater. Now that it is getting cold went to find the cord to plug in and could not findit and now they say there is no such thing. I am thinking it's going to be hard on starting
  • I guess "cold" is relative, but my CX-7 sleeps outside and I had no problems in the 20s last winter.

    There were issues with an "IMRC valve" recall; I think it just affected the 2007s, but cold weather made this defective part act up and cause real problems.

  • lwdblwdb Posts: 2
    I live in Canada where it gets to be -35C in the winter. Vehicles sometimes don't start unless being plugged in.
  • Hello All,

    Sorry for the delay! The dealer finally found my problem with my cx7. I had it in 3 times, the first two times they had it overnight and did all the usual stuff. Computer downloads, flashing this and that and nothing worked. I finally left it with them for 9 days and the problem ended up being my fuel pump. (High efficiency fuel pump which had to be ordered from Dallas)
    I can get more detailed info if anyone needs them. Have fun driving..

  • I am in the process of dealing with this issue. When it first happened they diagnosed a throttle bolt problem, and when that didn't fix the problem they tried a new fuel pump, which also didn't fix the problem. Then they installed a new high pressure fuel pump (I guess the CX7 has two fuel pumps). Finally, after 10 days it seemed like the problem was rectified. However one day later the problem reoccurred. They tell me it is the high pressure fuel pump again. Each time they have had to order the parts so the vehicle stays out of commission for an inordinate amount of time. All of this after four bouts with the CEL. To be true to form I should only get lemon air freshener for the vehicle in the future (if the shoe fits and all).
  • Hello,
    I feel for what your going through! Do what I did...tell them you are leaving your cx7 with them till the problem is fixed and arrange for the use of a loaner car. If they do not have this service available find a dealership that does....There is a fix, be patient and I wouldn't go buying the lemon air freshener just yet.
    I know how frustrated I was, but my cx7 is running perfect now. Drop it off and tell them to fix it. Keep me posted!
  • I should know tomorrow. After they replaced the high pressure fuel pump yet again, to no avail, they have told me it was a wiring issue and they think they have solved the problem - they just want to hold the vehicle one more day to make sure. I've had a rental, but I really didn't buy a CX7 just so I could drive a Ford Focus or Pontiac Grand Prix (its taken close to three weeks). Hopefully this is the fix.
  • Well, the POS went down again. Same problem. I honestly think there is a serious engineering issue with the CX7s, and I wouldn't be surprised if this starts cropping up more often as miles are added to these things. Never ever will I buy a Mazda again.
  • What iis the POS

    Thanks Charlie32
  • It's your service departments inability to fix the problem, take it elsewhere, it can be fixed.
  • They are the only Mazda dealership in town. If I want a rental while it is under repair I have to go to them. In any event, I believe they are going along with my lemon law claim and should be returning my money, unless the dealership is just jerking me around.
  • pgrudinpgrudin Posts: 1
    This morning we found that our new CX-7 (08) wouldn't start. It wouldn't crank. The doors would not lock or unlock remotely. Nada. No dash lights.

    The car was running fine last night. No warning lights.

    I'vew tried starting it in Park and in Neutral, checked the battery terminals, tried the remote start. Nothing. Not the slightest sign of life. ALthough I don't think the battery is dead (lights go off automatically), I will put it on a trickle charge just in case.

    Of course, I rather suspect that some expensive electronic thing is at fault. BUt I'd appreciate any suggestions other members might have.

  • zoom49zoom49 Posts: 76
    Check to see if your lights will turn on, which would indicate that battery is charged. Do you have a seperate car alarm? These can sometimes cause issues.
    Call Mazda free roadside assistance.
  • barb34barb34 Posts: 5
    I agree! I have had nothing but problems with the 2007 CX7 we bought new to bring to Europe with us while stationed here. Since getting here the AC Compressor has gone out ($1,000 no warranty thank you), shocks, brakes, vent air, defroster leaks all over the floor, lights and alarms that go off for no reason, and now the darn thing won't start. I understand brakes and shocks...but the rest of it?? PLUS, and here is the real kicker, Mazda will not ship to military overseas, nor will they honor warranty to military overseas (contrary to what the dealer says, they'll say anything won't they?). Wouldn't have bought a Mazda if I had known. It is very unsettling to be in a foreign country unable to speak the language well with a car that is so unreliable.

    Fun to drive, but so not worth it. I think I am going to follow your lead and put a lemon air freshener in it....maybe then it will get the message LOL.
  • In the last 6 times that I have filled up with gas, 4 of those times my "07" CX7 would not start. It would cough and sputter and not start. If I would push down on the gas peddle, I can get it to start and it will stay running as long as I keep the RPM's up. After apx. 5 minutes, it runs find and will not give me any problems until I fill it up again. I took it to a mechanic and their were two codes he pulled. One was that it was lean at start up. Can't remember the other one. After the engine light was reset, it came back on about 50 to 100 miles latter. Will take back to mechanic soon to see what the codes might say. Mechanic says he has never seen any problems like these and is very confused as to what it might be. Me too!!! Anybody have any thoughts???
  • I had sputtering problems when my CX7 reached about 70k miles (I now have 92k miles). I have started using a fuel injection cleaner that I add to my gas every 5,000 miles. I also do not let it run below a 1/4 tank of gas any more (I find the sputtering is worse when it is below 1/4 tank).

    In regards to the engine light, for me, it has been the gas cap. A friend of mine who also has a Mazda with high mileage (not CX7) has also had the same problem. I just make sure to push in the gas cap and turn it so it clicks 4 - 5 times. The light rarely comes on any more, and when it does, adjusting the cap fixes the problem.
  • i have a 2007 cx-7, i parked the car for the week end. went out to start, car will start and run for about 3 sec. and die, no default codes are coming up, has any body else had this problem. everthing checks out but still will not start, the shop i have it at is stumped, could this be a security problem? :mad: I willn't take to mazada, they rip you off :confuse:
  • Hello, I have a mazda 07 cx7 (aka nightmare) Your post was the only post I saw that fits my problem exactly..just wandering if you got yours fixed and if so can you please let me know what fixed it and the details.. I would really appreciate it. Thanks so much =) Melissa :confuse:
  • Heres my full story..My 2007 mazda cx7 will crank and run for about a second and then die...cannot tell if any warning lights are on due to the fact it wont stay on long enough. It first started while i was driving it.. I goosed it down a strait a way and it I attemted to restart and it would start for a second to only to die again. It drove pretty good up until that moment, However I have spent 2 grand on a new timing chain and accutator about 3 months ago.. I am really regreting getting this car last year after seeing all the head aches people are having with the 07 models. And to add insult to injury I just bought brand new tires and had the oil changed and air filter changed. The car just didn't appreciate it :( :confuse: if anyone has any suggestions please help..I really appreciate it!
  • My car has been fixed. The problem was the fuel pump,is runing perfect now.
  • greborgrebor Posts: 3
    edited February 2011
    I have not been able to solve my problem yet and am not willing to let the mechanics start putting new parts in it, if they don't know for sure. My starting problems only happens after I fill the tank with gas. I tried it with and without the engine running while filling but every time when I try to start it after filling the tank, it acts like it has ran out of gas. The only way to get it to start is by pushing on the gas pedal for about 10 seconds during that time it coughs and sputters. Then it runs just fine until I fill up the tank again.
  • Well got great news!! A mechanic friend of ours came and looked at our 07 cx7 and it took him 10 minutes to fix the problem. Come to find out..when I had the oil changed they also changed the air filter, the old one had lots of bugs in it.. well what happened was when ran the car fast that blowed a leftover moth into the air flow sensor and blocked the prongs..and therefore was not getting all he done was blowed out the moth now our car runs and it runs perfect!!! I know if we had of taken it to the dealer they would have charged alot! so greatful to our friend who was so knowledgeable. If anyone is having starting issues you and needs to check your air flow sensor to see if it is bad he said to just unplug it and if the car runs even if it runs rough just as long as it runs..thats the problem.. fortunately we didn't have to buy any parts! I hope this helps. :D
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