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

Rebuild Startup Question

Thread Tools
 
Search this Thread
 
Old 03-27-08, 02:23 PM
  #1  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
Rebuild Startup Question

I'm just installed a rebuilt 13bt into my gxl, and it wont start. I think it might be a used walbro I installed, when I turn the key to ACC should the fuel pump be running? I cant hear the fuel pump at all. And when I checked the spark plugs there was no smell of fuel on them.
Old 03-27-08, 02:58 PM
  #2  
RX-7 DISCIPLE

iTrader: (1)
 
Ex-Eg-Driver's Avatar
 
Join Date: Nov 2007
Location: NorCal,California
Posts: 1,039
Likes: 0
Received 0 Likes on 0 Posts
If you cant hear the fuel pump prime I guess it isnt working? Thats your first issue there.
Old 03-27-08, 03:03 PM
  #3  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
Just got a hold of haynes manual, and did the fuel pump test it worked. So I guess i'm just gonna keep on cranking.
Old 03-27-08, 03:33 PM
  #4  
Rotary Freak

iTrader: (6)
 
RotaryWeaponSE7EN's Avatar
 
Join Date: Dec 2001
Location: Mission,KS
Posts: 2,937
Likes: 0
Received 2 Likes on 1 Post
Check the electrical connections on the injectors themselves, their known to get pushed back.
Old 03-27-08, 03:39 PM
  #5  
HAILERS

 
HAILERS's Avatar
 
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes on 19 Posts
There ain't no such thing as PRIME on a RX-7. Stop it.

The pump runs when the key is HELD to START or the engine is actually running. There is a fuel pump check connector to pressurize the fuel rails to check for leakage. I assume you just did that per the Haynes.

Your car is FLOODED. Unplug the fuel pump altogether. Throw the Waldo in the trash heap where it belongs. Probably the same Waldo used on my weedwhacker.

Try using a two second spray of starter fluid in the air filter with no fuel pump connected to see if the thing will even cough.

Make sure your water thermo sensor is connected at the back of the water pump housing. The ECU uses a intenal Fuel Map for Starting. It looks at rpm under 500rpm, the water temp as seen by the water thermo sensor and a Start signal on pin 3B of the ECU, when in the start cycle.

Engine is flooded or the timing is waaaay off in left field since you have spark (you would have said so if you didn't, right? Right).

Or there's about a dozen other reasons like a air duct off blah, blah, blah.

You have low compression, that's why it's flooding imho.
Old 03-27-08, 03:58 PM
  #6  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
Thanks for the info, I put some oil in lower spark plug holes. And after a couple of times of trying to start it started but for a 1 second! Tryed starting again didn't start. I have rtek 1.8 so i guess if i want to unflood i can just press the gas. I think your right about the low compression. I'm using 10w30 is that ok for creating compression?
Old 03-27-08, 05:37 PM
  #7  
RX-7 DISCIPLE

iTrader: (1)
 
Ex-Eg-Driver's Avatar
 
Join Date: Nov 2007
Location: NorCal,California
Posts: 1,039
Likes: 0
Received 0 Likes on 0 Posts
Sorry about that

<<< Ex Honda Owner :P
Old 03-28-08, 09:09 AM
  #8  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
I got a hold of some marvel mystery oil and car starts more often but will only stay on for like 2 seconds holds idle at 1500 then dies. Not sure if it's still compression issue or what. How often should I inject MMO into lower spark plug holes?
Old 03-28-08, 02:25 PM
  #9  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
I fixed the timing as shown in haynes. But The car will not startup at all now. Now the buzzer is going off when I turn the key to ACC, I checked oil and it fine, checked coolant its also o.k.
Old 03-28-08, 09:45 PM
  #10  
Newbie
 
ncgtu's Avatar
 
Join Date: Sep 2006
Location: Fuquay Varina, NC
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Another thought...I had a similar problem after installing a rebuilt except for the buzzer. I had not moved the fuel injector diffusers from the old block to the new. They are easy to miss.
Old 03-29-08, 05:09 AM
  #11  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
Yup their installed, all brand new....
Old 03-29-08, 12:33 PM
  #12  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
Timing must be wrong because it won't startup now, if i'm not mistaken you line up the key on the eccentric shaft to the timing pin on front cover, and line up dimple with the body of CAS?
Old 03-29-08, 01:02 PM
  #13  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
I don't have the marks on my pulley because I painted the pulley, big oops.
Old 03-29-08, 07:14 PM
  #14  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
Anybody??
Old 03-29-08, 10:50 PM
  #15  
Rotarded for life

iTrader: (1)
 
SIDEWAYZE_FC's Avatar
 
Join Date: Dec 2007
Location: Spokane WA
Posts: 92
Received 0 Likes on 0 Posts
Id say timing. Im messing with trying to keep my 6 port turbo running. i moved the CAS without thinking now it wont stay running. so back to tinkering
Old 03-30-08, 07:44 AM
  #16  
Senior Member

Thread Starter
 
Fc3s_d1jp's Avatar
 
Join Date: Nov 2005
Location: Austin,TX
Posts: 268
Likes: 0
Received 0 Likes on 0 Posts
I've been tinkering but nothing.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
SakeBomb Garage
Vendor Classifieds
5
08-09-18 05:54 PM
SCinfidel
3rd Generation Specific (1993-2002)
4
09-08-15 05:36 PM
rotor_veux
2nd Generation Specific (1986-1992)
5
09-03-15 07:10 PM



Quick Reply: Rebuild Startup Question



All times are GMT -5. The time now is 06:53 PM.