Title: Rx7 Trouble?
Post by: colin777 on July 09, 2006, 02:02:44 AM
Post by: colin777 on July 09, 2006, 02:02:44 AM
do all rx7s take a good few turns in the ignition to get going. my turned about 5 or 6 time then started. and i left it to start up fully and tapped the gas and it popped like a backfire sound. is this normal or am i in trouble.:confused:
any help much appreciated
cheers
any help much appreciated
cheers
Title: Rx7 Trouble?
Post by: Rixio on July 09, 2006, 03:47:22 AM
Post by: Rixio on July 09, 2006, 03:47:22 AM
Sounds like low compression...how many miles has it done?
Title: Rx7 Trouble?
Post by: Frankie on July 09, 2006, 09:18:11 AM
Post by: Frankie on July 09, 2006, 09:18:11 AM
The backfiring or popping when warming up is normal if you blip the accelerator. Its just unburnt fuel as they run very rich during this time but as Rixio has advised you might need to get a compression test done regarding your slow starting.
Title: Rx7 Trouble?
Post by: iaint on July 09, 2006, 10:53:16 AM
Post by: iaint on July 09, 2006, 10:53:16 AM
Mine starts first turn of the key hot or cold so it does hint at a problem Colin but could be any of problems!
Title: Rx7 Trouble?
Post by: colin777 on July 09, 2006, 12:05:06 PM
Post by: colin777 on July 09, 2006, 12:05:06 PM
so what if its compression, whats the answer to that prob
Title: Rx7 Trouble?
Post by: colin777 on July 09, 2006, 12:18:30 PM
Post by: colin777 on July 09, 2006, 12:18:30 PM
Quote from: RixioSounds like low compression...how many miles has it done?
its got 63k kms
Title: Rx7 Trouble?
Post by: TRex on July 09, 2006, 12:19:15 PM
Post by: TRex on July 09, 2006, 12:19:15 PM
Poor replies... :2Rolleyes
Hard starting can be many things... more infomation is required for anyone to give you better help... Hot starts or cold, or after running? Whats the mileage, whats the set up of the car, is it modded ??????
Backfiring when cold or warming up is also not normal......
Hard starting can be many things... more infomation is required for anyone to give you better help... Hot starts or cold, or after running? Whats the mileage, whats the set up of the car, is it modded ??????
Backfiring when cold or warming up is also not normal......
Title: Rx7 Trouble?
Post by: colin777 on July 09, 2006, 12:24:22 PM
Post by: colin777 on July 09, 2006, 12:24:22 PM
cold starts, after i took it for a spin yesterday it took ages to start the compression light and temp light were on, i gave it 10 mins to cool down then she started. no mods, its a 94 type rZ
Title: Rx7 Trouble?
Post by: colin777 on July 09, 2006, 12:34:19 PM
Post by: colin777 on July 09, 2006, 12:34:19 PM
if its bad compression what does that point to straight away. the engine was done at 52k in japan and has 63k on it now so surely it dont need a rebuild or tips.
Title: Rx7 Trouble?
Post by: Adriansturgess on July 09, 2006, 12:46:22 PM
Post by: Adriansturgess on July 09, 2006, 12:46:22 PM
Mileage is only a rough guide to engine condition...Just depends on how they\'ve been driven and looked after....You need to get a compression check carried out by a rotary specialist to be sure.
Title: Rx7 Trouble?
Post by: Grizzly on July 09, 2006, 01:26:18 PM
Post by: Grizzly on July 09, 2006, 01:26:18 PM
Do you have an Aftermarket Boost gauge fitted?? If so where does it sit on Idle? and at what RPM?
That whould give you a rough idea of the Engines Condition but if you do a search there is lots of examples of this sort of thing that have turned out not to need a rebuild.
But stock fd\'s have been known to go anywhere between 30.000 miles and a 100.000 it all dpends on how its been treated. Also when\'s the last time it was serviced? bad Plugs will cause this sort of poor starting??
That whould give you a rough idea of the Engines Condition but if you do a search there is lots of examples of this sort of thing that have turned out not to need a rebuild.
But stock fd\'s have been known to go anywhere between 30.000 miles and a 100.000 it all dpends on how its been treated. Also when\'s the last time it was serviced? bad Plugs will cause this sort of poor starting??
Title: Rx7 Trouble?
Post by: Frankie on July 09, 2006, 10:21:11 PM
Post by: Frankie on July 09, 2006, 10:21:11 PM
Quote from: TRexBackfiring when cold or warming up is also not normal......
I really dont think the popping is necessarily a problem. See this old thread http://www.mazdarotaryclub.com/forums/showthread.php?t=5295&highlight=popping
Mine has less than 4000 miles since its rebuild and before buying my car I looked at several and they did the same.
Title: Rx7 Trouble?
Post by: ro284 on July 09, 2006, 10:29:31 PM
Post by: ro284 on July 09, 2006, 10:29:31 PM
My REX does not backfire or pop at all, about 12 k on a rebuild, so surely something is not right, surely any igniting of the fuel shoud be in the housings not in the exhaust pipe!
Bob
Bob
Title: Rx7 Trouble?
Post by: colin777 on July 09, 2006, 11:46:16 PM
Post by: colin777 on July 09, 2006, 11:46:16 PM
Quote from: GrizzlyDo you have an Aftermarket Boost gauge fitted?? If so where does it sit on Idle? and at what RPM?
That whould give you a rough idea of the Engines Condition but if you do a search there is lots of examples of this sort of thing that have turned out not to need a rebuild.
But stock fd\'s have been known to go anywhere between 30.000 miles and a 100.000 it all dpends on how its been treated. Also when\'s the last time it was serviced? bad Plugs will cause this sort of poor starting??
NO BOOST GAUGE LAD.
SHES GOING A LOT BETTER TODAY. STARTIN FIRST TIME. STILL THE ODD POP STARTIN FROM COLD AND IF I PULL UP AT LIGHTS AND SIT THERE FOR A WHILE SHE MIGHT POP SOMETIMES.
Title: Rx7 Trouble?
Post by: Marky B on July 10, 2006, 01:17:50 AM
Post by: Marky B on July 10, 2006, 01:17:50 AM
Sounds like mine did when I needed new plugs. I\'d try that first mate, it\'s worth a try for the cost, and you can do it yourself. you can get them from above but it\'s easier from below IMO.
Mark
Mark
Title: Rx7 Trouble?
Post by: iaint on July 10, 2006, 09:07:44 AM
Post by: iaint on July 10, 2006, 09:07:44 AM
Quote from: TRexPoor replies... :2RolleyesSorry we\'re not all technical Gods like you matey, you\'re a regular hero. :Laugh
Quote from: TRexHard starting can be many things... more infomation is required for anyone to give you better help... Hot starts or cold, or after running? Whats the mileage, whats the set up of the car, is it modded ??????
Backfiring when cold or warming up is also not normal......
Seconded on the backfiring thing - you should only really get pops and bangs when fully warmed up (i.e. exhaust hot enough to ignite unburnt fuel). Usually you can solicit a few rumbles by tapping the throttle but much depends on aftermarket mods.
Are you running with a cat, upgraded ECU, etc?
As Marky B says - try changing the plugs or at least seeing what state they are in. Bit of a pig of a job though, you\'ll need a short handled plug wrench.
Title: Rx7 Trouble?
Post by: clive on July 10, 2006, 09:20:06 AM
Post by: clive on July 10, 2006, 09:20:06 AM
Hi Colin,
Your car should start with virtually the flick of the key.
One thing that comes to mind is do you let it warm up properly as it may have flooded just slightly if you hadn\'t, this would mean it would take a few turns to start.
Also if you blipped the throttle when cold you had dumped even more fuel into the engine that would have been in cold start mode at the time, so yes it would have popped due to too much fuel.
BTW always leave the car to warm up fully and let it come off its cold start cycle ( you will hear the revs drop to normal tickover) or you have the possibility of flooding the car and making it imposable to restart
Hope this helps
Your car should start with virtually the flick of the key.
One thing that comes to mind is do you let it warm up properly as it may have flooded just slightly if you hadn\'t, this would mean it would take a few turns to start.
Also if you blipped the throttle when cold you had dumped even more fuel into the engine that would have been in cold start mode at the time, so yes it would have popped due to too much fuel.
BTW always leave the car to warm up fully and let it come off its cold start cycle ( you will hear the revs drop to normal tickover) or you have the possibility of flooding the car and making it imposable to restart
Hope this helps
Title: Rx7 Trouble?
Post by: Adriansturgess on July 10, 2006, 09:24:00 AM
Post by: Adriansturgess on July 10, 2006, 09:24:00 AM
Mine tends to pop a couple of times as it drops off the cold start cycle down to normal idle revs, although I don\'t think its always done this, but seems to these days.
Title: Rx7 Trouble?
Post by: TRex on July 10, 2006, 11:22:01 AM
Post by: TRex on July 10, 2006, 11:22:01 AM
Not a smart arse Iain, I just do not get caught up diving into a post like people in here and offering advise before knowing the full story.. As that can make things worse by giving incorrect advise..
Hope you don\'t go to the doctor and tell him \'I have a cough\'... without asking more questions he tells you, you have 2 weeks to live and gives you a load of advise how to spend your last few days!
I also doubt that mazda or any manufacture will make/design a car to backfire when cold... lol
You guys need to get your cars fixed........!["Too]("http://smileys.smileycentral.com/cat/4/4_1_102.gif")
Hope you don\'t go to the doctor and tell him \'I have a cough\'... without asking more questions he tells you, you have 2 weeks to live and gives you a load of advise how to spend your last few days!
I also doubt that mazda or any manufacture will make/design a car to backfire when cold... lol
You guys need to get your cars fixed........
Title: Rx7 Trouble?
Post by: Frankie on July 10, 2006, 02:20:03 PM
Post by: Frankie on July 10, 2006, 02:20:03 PM
Quote from: TRexI also doubt that mazda or any manufacture will make/design a car to backfire when cold... lol
You guys need to get your cars fixed........
Out of the factory they have catalytic convertors and more restrictive exhausts.
Guess these guys have problems as well then...
http://www.fduk.org/forum/showthread.php?t=4204&highlight=popping
http://www.fduk.org/forum/showthread.php?t=1909&highlight=popping
Title: Rx7 Trouble?
Post by: shafster on July 10, 2006, 02:34:01 PM
Post by: shafster on July 10, 2006, 02:34:01 PM
im not too clued up on the ins and outs but having owned mine for about 6 months, i can say this.
on start up after it has warmed up, it will pop loudly a few times as i reverse off my drive and then for the first 10secs of driving on strong boost. after that all is well and it behaves itself with only the odd pop here and there. it has always done this since day one of ownership and has had no ill effects so far.... touch wood.
on start up after it has warmed up, it will pop loudly a few times as i reverse off my drive and then for the first 10secs of driving on strong boost. after that all is well and it behaves itself with only the odd pop here and there. it has always done this since day one of ownership and has had no ill effects so far.... touch wood.
Title: Rx7 Trouble?
Post by: TRex on July 10, 2006, 02:56:03 PM
Post by: TRex on July 10, 2006, 02:56:03 PM
Ahh, you done a search on \'popping\'...
Note I specifically stated \'backfiring\'...... big difference! ;)
Popping on a modded car is not uncommon..
Backfiring on the other hand(as clearly stated) when cold or idling, then as said earlier.. get your car checked out.. :Thumbs-up
Another one of my posts not being read correctly and misconstrued!["Bungy]("http://smileys.smileycentral.com/cat/7/7_2_112.gif")
Note I specifically stated \'backfiring\'...... big difference! ;)
Popping on a modded car is not uncommon..
Backfiring on the other hand(as clearly stated) when cold or idling, then as said earlier.. get your car checked out.. :Thumbs-up
Another one of my posts not being read correctly and misconstrued
Title: Rx7 Trouble?
Post by: TRex on July 10, 2006, 03:04:28 PM
Post by: TRex on July 10, 2006, 03:04:28 PM
Anyway back on track gents.......
If the chap gives us more info, someone should be able to help him out....!["Waiter"]("http://smileys.smileycentral.com/cat/36/36_17_7.gif")
If the chap gives us more info, someone should be able to help him out....
Title: Rx7 Trouble?
Post by: iaint on July 10, 2006, 03:49:33 PM
Post by: iaint on July 10, 2006, 03:49:33 PM
Trex - what\'s with the \'random\' links at the end of your posts recently?
Title: Rx7 Trouble?
Post by: colin777 on July 10, 2006, 06:04:43 PM
Post by: colin777 on July 10, 2006, 06:04:43 PM
No After Market Bits Lads, No New Ecu No Re Map. And Im Going Changin Plugs This Week. I Have An Upgrade Rad And Intercooler On The Way With Apexi Filters
Title: Rx7 Trouble?
Post by: Grizzly on July 10, 2006, 06:12:16 PM
Post by: Grizzly on July 10, 2006, 06:12:16 PM
Stick Apexi Power Fc high on your to buy list too...
Title: Rx7 Trouble?
Post by: colin777 on July 10, 2006, 06:17:38 PM
Post by: colin777 on July 10, 2006, 06:17:38 PM
are they just air/petrol mix control or do they hace booooooooooossst control
Title: Rx7 Trouble?
Post by: Grizzly on July 10, 2006, 06:19:52 PM
Post by: Grizzly on July 10, 2006, 06:19:52 PM
PFC does you fuel and air and you want a Profect B2 for your Boost. For a good set up ;)
Title: Rx7 Trouble?
Post by: colin777 on July 10, 2006, 06:22:31 PM
Post by: colin777 on July 10, 2006, 06:22:31 PM
whats the SAFC2 so. would that do.
Title: Rx7 Trouble?
Post by: vxer on July 10, 2006, 06:34:11 PM
Post by: vxer on July 10, 2006, 06:34:11 PM
Quote from: GrizzlyDo you have an Aftermarket Boost gauge fitted?? If so where does it sit on Idle? and at what RPM?
That whould give you a rough idea of the Engines Condition but if you do a search there is lots of examples of this sort of thing that have turned out not to need a rebuild.
Out of interest, what amount of vaccum is vgood/good/bad to read at what RPM on idle?
Also, how do these values correspond to regular compression test numbers?
Cheers, Paul.
Title: Rx7 Trouble?
Post by: adib on July 12, 2006, 01:07:24 PM
Post by: adib on July 12, 2006, 01:07:24 PM
mine used to pop all the time, but after putting power fc in and remap it does not do it as much now