2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

need help dianosing this problem: no acceleration + smooth idle

Thread Tools
 
Search this Thread
 
Old 03-30-12, 08:11 AM
  #26  
Full Member

Thread Starter
 
merdok's Avatar
 
Join Date: Apr 2005
Location: Pittsburgh
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by MIDNFauciUSN
Lol, sorry for bringing you back to this. But glad to help.
And thanks for the help, I honestly do appreciate it.
Old 03-31-12, 09:10 PM
  #27  
Full Member

Thread Starter
 
merdok's Avatar
 
Join Date: Apr 2005
Location: Pittsburgh
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by MIDNFauciUSN
Compression check gets my vote.
http://mofodot.info/2012/projects/compression-test-rx7

ran compression test today. looks okay to me.. doesnt it?

i was looking to find some ground that some post was making it sound like could be it, near the firewall? i might be barking up the wrong tree again. the similar thing to the post is that my oil preasure guage is dead.
Old 03-31-12, 09:18 PM
  #28  
Moderator

iTrader: (1)
 
satch's Avatar
 
Join Date: Jun 2005
Location: tulsa,ok.
Posts: 11,738
Received 12 Likes on 11 Posts
And if you wanted to verify whether the injector plugs were secured to the primary injectors you could check for battery voltage on pins 3E (front primary) and 3C (rear primary) w/key to on.
Old 03-31-12, 09:28 PM
  #29  
Full Member

Thread Starter
 
merdok's Avatar
 
Join Date: Apr 2005
Location: Pittsburgh
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by satch
And if you wanted to verify whether the injector plugs were secured to the primary injectors you could check for battery voltage on pins 3E (front primary) and 3C (rear primary) w/key to on.
When I had that all apart I tested all four pins and they pulled the proper 12v for each of them.

Today I also ferified the afm physically after testing it. just ensureing that the flap was freely moving properly. seemed proper.
Old 04-02-12, 10:29 AM
  #30  
Full Member

Thread Starter
 
merdok's Avatar
 
Join Date: Apr 2005
Location: Pittsburgh
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by merdok
http://mofodot.info/2012/projects/compression-test-rx7

ran compression test today. looks okay to me.. doesnt it?
Can anyone confirm if this seems like its hitting high enough compression? seems like they spike at around 90ish. only thing i saw of a bad test was like one good two bad pulses.
Old 04-02-12, 11:40 AM
  #31  
Rotary Enthusiast

 
florotory's Avatar
 
Join Date: Sep 2009
Location: Omaha, Ne
Posts: 883
Received 0 Likes on 0 Posts
Does it feel sluggish or bog down then go? Check to make sure your coils are firing properly. Especially grounded. I had a very similar issue and after a month,yes a month of diagnosing I accidentally found out that one of my coils was not grounded properly even though it looked like it was.
Old 04-02-12, 08:18 PM
  #32  
Full Member

Thread Starter
 
merdok's Avatar
 
Join Date: Apr 2005
Location: Pittsburgh
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by florotory
Does it feel sluggish or bog down then go? Check to make sure your coils are firing properly. Especially grounded. I had a very similar issue and after a month,yes a month of diagnosing I accidentally found out that one of my coils was not grounded properly even though it looked like it was.
Its more like if you give it too much it will bog down, but regardless at a point it will no longer rev any further. I am trying to find a document to locate all the ground i should be concerned with.
Old 04-02-12, 08:32 PM
  #33  
Rotary Enthusiast

 
florotory's Avatar
 
Join Date: Sep 2009
Location: Omaha, Ne
Posts: 883
Received 0 Likes on 0 Posts
i took a piece of battery cable and used it as a ground for the coil (just to test it after i accidentally discovered my issue). so you can do that to test it. Just bolt the cable to the body of the coil. the coils use theyre mounting locations as grounds as well as a harness. so it may also help to clean the mounting surface. if you search my profile i had a thread about a year ago when i was having the issue. may have a vid in it too maybe to compare your issue.
Old 04-02-12, 09:29 PM
  #34  
Full Member

Thread Starter
 
merdok's Avatar
 
Join Date: Apr 2005
Location: Pittsburgh
Posts: 57
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by florotory
i took a piece of battery cable and used it as a ground for the coil (just to test it after i accidentally discovered my issue). so you can do that to test it. Just bolt the cable to the body of the coil. the coils use theyre mounting locations as grounds as well as a harness. so it may also help to clean the mounting surface. if you search my profile i had a thread about a year ago when i was having the issue. may have a vid in it too maybe to compare your issue.
I will for the thread you are talking about.

I was trying to locate the ECU ground on the engine, pulled the cable that connects the alternater and plugs out of the way and found this...


didnt really locate what it collected to. possibly the cause?
Old 04-03-12, 08:14 AM
  #35  
Senior Member

iTrader: (1)
 
marclong's Avatar
 
Join Date: Mar 2002
Location: Jefferson , Ga
Posts: 392
Likes: 0
Received 0 Likes on 0 Posts
looks like oil pressure connector. cant tell for sure.
Old 04-03-12, 08:12 PM
  #36  
Rotary Enthusiast

 
florotory's Avatar
 
Join Date: Sep 2009
Location: Omaha, Ne
Posts: 883
Received 0 Likes on 0 Posts
Originally Posted by marclong
looks like oil pressure connector. Cant tell for sure.
+1
Old 04-03-12, 08:13 PM
  #37  
Rotary Enthusiast

 
florotory's Avatar
 
Join Date: Sep 2009
Location: Omaha, Ne
Posts: 883
Received 0 Likes on 0 Posts
Any luck on your issue
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
The1Sun
1st Generation Specific (1979-1985)
7
09-18-15 07:13 PM
The1Sun
New Member RX-7 Technical
5
09-15-15 04:45 PM
RotaryBobby
1st Generation Specific (1979-1985)
1
09-10-15 01:33 PM
rx7shirley
2nd Generation Specific (1986-1992)
6
09-02-15 02:11 PM



Quick Reply: need help dianosing this problem: no acceleration + smooth idle



All times are GMT -5. The time now is 04:11 AM.