Throttle Actuator problem
05-08-2009, 05:21 PM
#1
Throttle Actuator problem
So here's my problem
Reset ECU....throttle works for about 6-8 seconds..car throws a solid CEL...and throttle is limited to maybe 5% opening. There is no code for the CEL( that my scanner can see anyway), and when the PCM is reset the throttle works as above again. If I try to restart without a clear the throttle is limited as above
I've checked the wiring harness for the throttle, tried a new throttle body, tested the harness to the MAF, TB, MOP....fuses and relays are all good....tested the harness to the relays.
I'm almost ready to put a frag grenade under the hood and pull the pin
Any ideas what can cause an instant CEL and limp mode?? I think it might be the MOP....but the current one tests OK
Reset ECU....throttle works for about 6-8 seconds..car throws a solid CEL...and throttle is limited to maybe 5% opening. There is no code for the CEL( that my scanner can see anyway), and when the PCM is reset the throttle works as above again. If I try to restart without a clear the throttle is limited as above
I've checked the wiring harness for the throttle, tried a new throttle body, tested the harness to the MAF, TB, MOP....fuses and relays are all good....tested the harness to the relays.
I'm almost ready to put a frag grenade under the hood and pull the pin
Any ideas what can cause an instant CEL and limp mode?? I think it might be the MOP....but the current one tests OK
05-08-2009, 06:28 PM
#12
Nope....Problem is there is no codes set ( with the Scanalyzer anyway) I have a Service manual and didn't see that list??
I thought that MOP, ECT and DBW problems were the only ones that caused limp mode...and none of those codes are coming up...and everything I can think of scopes/checks out
I thought that MOP, ECT and DBW problems were the only ones that caused limp mode...and none of those codes are coming up...and everything I can think of scopes/checks out
05-08-2009, 06:41 PM
#13
I have never seen a list - just thought it would help you eliminate the possibilities if you had that info .... Perhaps Mazda could help with that ???
You have more than one version of scanalyser don't you ? Try the USB version if you haven't already ...
You have more than one version of scanalyser don't you ? Try the USB version if you haven't already ...
Last edited by Brettus; 05-08-2009 at 06:43 PM.
05-08-2009, 06:45 PM
#14
Suppose...problem is I find them less than helpful usually. Maybe if I could talk to a high level tech guy I could get some answers. The usual run of the mill techs have a difficult time with even the service manual stuff ( no slight to anyone who is a tech on here...nothing personal..just my experience with Mazda Canada)
05-08-2009, 11:48 PM
#18
wow,
dan send me an email. i will ask the question to the two master techs i know on monday.
but something on the inside of the passenger compartment? connections to the pedal itself? i saw a note on a failed acc pedal assembly recently. but odd, way odd..
beers
dan send me an email. i will ask the question to the two master techs i know on monday.
but something on the inside of the passenger compartment? connections to the pedal itself? i saw a note on a failed acc pedal assembly recently. but odd, way odd..
beers
05-10-2009, 09:29 PM
#24
Administrator
nm re-read first post.
what about fried o2 sensor? could possibly make the pcm think its in an overtemp situation so it limits throttle.
orrrrrrr........ what about weird signal from eshaft sensor? thinks its running high rpm sitting still- triggers low throttle.......
what about fried o2 sensor? could possibly make the pcm think its in an overtemp situation so it limits throttle.
orrrrrrr........ what about weird signal from eshaft sensor? thinks its running high rpm sitting still- triggers low throttle.......
05-10-2009, 09:39 PM
#25
I've got a dealer mechanic ( one of the good ones 
) coming over Tuesday night with the OEM Scanner......maybe there is a code that isn't showing up in the Hymsters Scanner
It's really a PIA...if I could get a throttle response..I could tune it and make it to the track day on the 29th in my car
) coming over Tuesday night with the OEM Scanner......maybe there is a code that isn't showing up in the Hymsters Scanner It's really a PIA...if I could get a throttle response..I could tune it and make it to the track day on the 29th in my car
Thread
Thread Starter
Forum
Replies
Last Post
JimmyBlack
Series I Major Horsepower Upgrades
273
02-10-2020 10:23 PM
nowakm99
Series II Technical and Trouble shooting
1
10-09-2015 07:10 AM
