New Member RX-7 Technical Post your first technical questions here, in an easy flame free environment, before jumping into the main technical sections.

FD - dies at idle.

Thread Tools
 
Search this Thread
 
Old 06-13-18, 10:04 PM
  #1  
Junior Member
Thread Starter
 
Zezxy's Avatar
 
Join Date: Jun 2017
Location: Japan
Posts: 28
Received 1 Like on 1 Post
Exclamation FD - Flooding at idle

To start off, I've had similar issues before and fixed them. Now, after having my RX-7 for about a year, I've started having a new issue after I had her running very well for a few months.
There are no vacuum leaks that I have found, the compression is also in good working order. It has been tuned by professionals as well.

Basically. If I let it sit at idle, and am not giving it gas, such as at a light or coasting down a hill, it will try to die. If it dies, the engine floods more often than not and I have to WOT and crank for a few seconds or more just to start it. Sometimes it can do this every 10 minutes while driving, or it won't do it for a few hours, but it usually does it daily. Starts up great otherwise. Drives great as long as I'm not sitting at idle. Videos below show what it's like as it starts to die vs what it's like normally while driving.

Dying

Good

Both of these videos were taken within 30 minutes. The dying video was about 10 minutes after starting the car while letting it warm up after 4 hours of sitting, the good was taken about 20 minutes after the dying video once I got home.
I have been looking up other threads from things that can cause this, and I saw one of them could be the coolant seals. My coolant has not gone down in over a month, Sitting about an inch under the cap in the same place that it always is. I haven't changed the spark plugs in a while but I'm not sure if that's the issue, will do that this weekend. Another said it could be grounding to ECU, but I've never seen anyone else ground their PFC and I don't know if there's a certain place it should be grounded to or if the chassis is fine. Could really use some advice here. Not sure if it's a fuel issue since it runs perfect as long as it's not at idle at the wrong time. Thanks in advance!

Last edited by Zezxy; 06-14-18 at 02:01 AM.
Zezxy is offline  
Old 06-15-18, 01:58 PM
  #2  
Can Post Only in New Member Section
 
3lement85's Avatar
 
Join Date: Jun 2018
Location: Santa Clara
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Couple of questions when the engine floods does this happen on its own or did you try and give the car gas while coasting with the engine off? btw a coolant leak wouldn't cause the issue.

At first thought this sounds like one of two things. A timing issue or a vacuum leak. I would check the turbo inlets to ensure they aren't leaking and then you'll have to tackle the rats nest. Since the rats nest is a challenge I attached a diagram which might be helpful.

3lement85 is offline  
Old 06-15-18, 10:35 PM
  #3  
Junior Member
Thread Starter
 
Zezxy's Avatar
 
Join Date: Jun 2017
Location: Japan
Posts: 28
Received 1 Like on 1 Post
Originally Posted by 3lement85
Couple of questions when the engine floods does this happen on its own or did you try and give the car gas while coasting with the engine off? btw a coolant leak wouldn't cause the issue.

At first thought this sounds like one of two things. A timing issue or a vacuum leak. I would check the turbo inlets to ensure they aren't leaking and then you'll have to tackle the rats nest. Since the rats nest is a challenge I attached a diagram which might be helpful.
I don't believe it's a vacuum leak. I'm starting to notice that it's not "dying" at idle, it's completely flooding at idle. It floods while at idle, and if I floor the gas to stop it, sometimes it will stop it from dying, other times it will just flood over and die. I assume it's an injector or fuel issue.
Zezxy is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
englishtom1596
2nd Generation Specific (1986-1992)
25
12-10-10 08:32 AM
twister7
Megasquirt Forum
15
02-04-07 03:50 PM
guru20
2nd Generation Specific (1986-1992)
3
01-11-02 05:04 AM
TheAMAZINGNorad
1st Generation Specific (1979-1985)
11
09-26-01 10:46 PM
hurleyboi514
2nd Generation Specific (1986-1992)
3
09-25-01 02:23 PM



Quick Reply: FD - dies at idle.



All times are GMT -5. The time now is 02:00 AM.