Can a Bad ECU cause this?
10-09-02, 03:05 PM
#1
Rotary Freak
Thread Starter
iTrader: (3)
Join Date: Feb 2002
Location: MN
Posts: 1,697
Likes: 0
Received 0 Likes
on
0 Posts
Can a Bad ECU cause this?
...sudden loss of power and violent hesitation?
Cause thats what happened to me while driving, and I'm trying to see if its something else besides a blown motor. I have spark, and I think I have fuel. How do I test the ECU?
1991 n/a
Cause thats what happened to me while driving, and I'm trying to see if its something else besides a blown motor. I have spark, and I think I have fuel. How do I test the ECU?
1991 n/a
10-09-02, 04:18 PM
#3
Now with more 1st Gen!
Join Date: Dec 2001
Location: Ottawa
Posts: 1,534
Likes: 0
Received 0 Likes
on
0 Posts
Well you can test ALL of the ECU inputs and outputs... (good 1.5 hour activity there... 
) ...dunno if this is an adequate "test" of the ECU though... Aaron?
(Other than the time it takes to do, its a fairly easy procedure..
)
) ...dunno if this is an adequate "test" of the ECU though... Aaron?(Other than the time it takes to do, its a fairly easy procedure..
)
10-09-02, 04:22 PM
#4
Rotary Freak
Thread Starter
iTrader: (3)
Join Date: Feb 2002
Location: MN
Posts: 1,697
Likes: 0
Received 0 Likes
on
0 Posts
Aaron, I am almost sure its a blown apex seal. But i want to get a consensus since I cant get a real compression test done.
I was driving on the hyw. slowed down for offramp, on offramp it began suddenly to violently shake and lost a ton of power. As I pulled off the ramp, it died and would not start again.
I tested spark and thats good. I just find it curious that if its a blown motor...there are no error codes on the ECU - thats why I asked here.
Thanks
I was driving on the hyw. slowed down for offramp, on offramp it began suddenly to violently shake and lost a ton of power. As I pulled off the ramp, it died and would not start again.
I tested spark and thats good. I just find it curious that if its a blown motor...there are no error codes on the ECU - thats why I asked here.
Thanks
10-09-02, 05:28 PM
#5
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,841
Received 2,605 Likes
on
1,848 Posts
it would be easier to check the compression, unless you get code 14 (the replace ecu code) then the ecu is almost the last part in the diagnostic "chain"
mike
mike
11-30-08, 06:13 PM
#6
??????
Join Date: Nov 2008
Location: florida
Posts: 30
Likes: 0
Received 0 Likes
on
0 Posts
Aaron, I am almost sure its a blown apex seal. But i want to get a consensus since I cant get a real compression test done.
I was driving on the hyw. slowed down for offramp, on offramp it began suddenly to violently shake and lost a ton of power. As I pulled off the ramp, it died and would not start again.
I tested spark and thats good. I just find it curious that if its a blown motor...there are no error codes on the ECU - thats why I asked here.
Thanks
I was driving on the hyw. slowed down for offramp, on offramp it began suddenly to violently shake and lost a ton of power. As I pulled off the ramp, it died and would not start again.
I tested spark and thats good. I just find it curious that if its a blown motor...there are no error codes on the ECU - thats why I asked here.
Thanks
12-01-08, 06:56 AM
#7
I changed my fuel filter, replaced my fuel pump sock and swapped my fuel pump, verified my injector spray patterns before I checked the codes. Wasted time and money. Check the codes first. If it is MOP codes, there is a pretty good chance that the output section of your ECU is fried. DO NOT swap in a new ECU until you have thoroughly verified the new MOP. Look at this thread- https://www.rx7club.com/showthread.p...light=mop+test
Check the codes first. FSM for the procedure.
Good Luck.
Last edited by jackhild59; 12-01-08 at 07:04 AM.
Trending Topics
12-02-08, 08:56 AM
#9
Thread
Thread Starter
Forum
Replies
Last Post
befarrer
Microtech
3
08-22-15 05:52 PM
