|
|
Post by refandy on Apr 19, 2021 16:10:49 GMT
Hi all, I’m new on the forum and I’d very much appreciate your advice with my sick MX-5
I returned to my car to find the alarm sounding, it turned off when I opened it, I started the engine and it idle at about 2500 rpm and had no throttle response at all. The AA towed it to a Mazda dealer who have diagnosed corrosion in engine ecu while quoting £3/4000 to repair. My question is does this sound reasonable and is it a common fault these cars suffer with? The cars a 2012 and only driven 9000 miles. Is there any other more financially viable repair option available pls? Thanks in advance for reading this/offering your experience, Refandy
|
|
|
|
Post by wannabe on Apr 19, 2021 16:17:27 GMT
Hi all, I’m new on the forum and I’d very much appreciate your advice with my sick MX-5 I returned to my car to find the alarm sounding, it turned off when I opened it, I started the engine and it idle at about 2500 rpm and had no throttle response at all. The AA towed it to a Mazda dealer who have diagnosed corrosion in engine ecu while quoting £3/4000 to repair. My question is does this sound reasonable and is it a common fault these cars suffer with? The cars a 2012 and only driven 9000 miles. Is there any other more financially viable repair option available pls? Thanks in advance for reading this/offering your experience, Refandy Errrr.... wuuuuuut?? Four grand for a replacement ECU? Did you get that quote in writing? lol Welcome to the forum  Is it an NC or ND at 2012? Must be NC, surely. You could probably do an entire engine swap for £4k, rather than just unplugging and replacing the ECU box... (requirements to code the security and other bits noted). |
|
|
|
Post by dadbif on Apr 19, 2021 21:14:03 GMT
You can buy another car for that much money. Remove it from the dealers clutches ASAP.
|
|
|
|
Post by wannabe on Apr 19, 2021 22:29:05 GMT
refandy, whereabouts are you in this fine land of ours? |
|
|
|
Post by howardb66 on Apr 20, 2021 8:52:28 GMT
That’s pretty much theft by the dealer. I’d remove it asap as said previously.
When did you last replace the battery? If it’s only done 9k in 8 years, I doubt it getting a regular good charge.
If it is the ECU, it’s worth getting one from eBay to try. They’re 30-50.
|
|
|
|
Post by wannabe on Apr 20, 2021 9:37:34 GMT
If they are claiming corrosion in the ECU, presumably they can show this to you, given it just unplugs... (although it will probably just be a sealed box, so not any use to look at the insides!)
|
|
|
|
Post by dadbif on Apr 20, 2021 11:40:55 GMT
Could just be corroded/dirty pins on the ecu plug, worth a wiggle about, resistance soon builds up.
|
|
|
|
Post by wannabe on Apr 20, 2021 13:32:39 GMT
Could just be corroded/dirty pins on the ecu plug, worth a wiggle about, resistance soon builds up. So four grand to scrub some oxidisation off? Sounds like a bargain  lol OP - please come back and let us know what happens! |
|
|
|
Post by atlex on Apr 20, 2021 21:06:13 GMT
always pains me to hear of dealers trying this on.
|
|
|
|
Post by wannabe on Apr 20, 2021 21:45:02 GMT
Name and shame the dealer, I say!
|
|
|
|
Post by refandy on Apr 21, 2021 8:20:00 GMT
Thanks for the reply’s, after further info from dealer they say water has leaked into the car causing corrosion at the ecu and wiring harness. They say they have tried cleaning it up but new loom and ecu required.
Am I right in thinking any new/second hand ecu isn’t just “plug and play” and would need programming if I obtained one?
|
|
|
|
Post by howardb66 on Apr 21, 2021 9:26:39 GMT
Thanks for the reply’s, after further info from dealer they say water has leaked into the car causing corrosion at the ecu and wiring harness. They say they have tried cleaning it up but new loom and ecu required. Am I right in thinking any new/second hand ecu isn’t just “plug and play” and would need programming if I obtained one? A replacement standard ECU is plug & play. When vehicles are manufactured, they’re all the same otherwise the costs would be astronomical writing each ECU to each individual car produced. Just make sure that it’s of a similar spec as the one being removed. |
|
|
|
Post by Zed. on Apr 21, 2021 10:05:28 GMT
Thanks for the reply’s, after further info from dealer they say water has leaked into the car causing corrosion at the ecu and wiring harness. They say they have tried cleaning it up but new loom and ecu required. Am I right in thinking any new/second hand ecu isn’t just “plug and play” and would need programming if I obtained one? A replacement standard ECU is plug & play. When vehicles are manufactured, they’re all the same otherwise the costs would be astronomical writing each ECU to each individual car produced. Just make sure that it’s of a similar spec as the one being removed. It's possible that ecu / dash cluster / keys & locks are 'bound' as a set (if buying secondhand) as part of vehicle security efforts  plenty of 'sets' on ebay for not a lot of money Rich. |
|
|
|
Post by wannabe on Apr 21, 2021 11:44:06 GMT
I'm struggling to see how water could have corroded the wiring harness to the point that a whole new loom is needed.
It's copper cabling in a plastic/rubber sheath, isn't it?
With Steel(?) connections housed within water-tight plastic connectors?
This all smells a bit funny if you ask me.
I'd get the car removed and taken elsewhere for a second opinion.
Where are you?
There are some 5 specialists that might well do you a better service...
|
|
|
|
Post by refandy on Apr 21, 2021 21:46:13 GMT
Thanks everyone for your suggestions, the cars in Hampshire, I’ll def look for a second opinion from an MX5 independent specialist and let you all know what happens, thanks again
|
|
lol
le sigh