Past basic diagnostics now...HELP!!!!
07-11-03, 10:54 PM
#1
Full Member
Thread Starter
Join Date: Jun 2002
Location: Ottawa, Canada
Posts: 142
Likes: 0
Received 0 Likes
on
0 Posts
Past basic diagnostics now...HELP!!!!
Been busy this year with work ****, and finally getting the rex back on the road, but the damn thing won't start...
Hot spark on all four plugs....
Gas pumping at about 1 litre (quart) for 10 seconds cranking (Wild *** Guess, not measured)....
Nothing happening....
But the damn thing fires for about 1 or 2 seconds once I disconnect the gas line!
I haven't tried ATF, but I am getting good pressure sounds when the spark plugs are out, and as I say, it does fire when the gas line is disconnected.
Anyone have any thoughts on what to check next?
My prior mechanical knowledge is near-zero, I bought the Rex as a learning experience (plus the fact that I love the look of the beast!). My assumption is that one of the "rats nest" valves is behaving badly, but I don't know how to diagnose it further. Anyone have any suggestions?
Hot spark on all four plugs....
Gas pumping at about 1 litre (quart) for 10 seconds cranking (Wild *** Guess, not measured)....
Nothing happening....
But the damn thing fires for about 1 or 2 seconds once I disconnect the gas line!
I haven't tried ATF, but I am getting good pressure sounds when the spark plugs are out, and as I say, it does fire when the gas line is disconnected.
Anyone have any thoughts on what to check next?
My prior mechanical knowledge is near-zero, I bought the Rex as a learning experience (plus the fact that I love the look of the beast!). My assumption is that one of the "rats nest" valves is behaving badly, but I don't know how to diagnose it further. Anyone have any suggestions?
07-12-03, 09:49 AM
#6
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,832
Received 2,603 Likes
on
1,847 Posts
Originally posted by JIMMY54
If the plugs are bone dry somthing has gotten clogged within the Carb. Dry pouring some gas directly in and try to see if it will start. If it does you know the problem is within the Carb.
If the plugs are bone dry somthing has gotten clogged within the Carb. Dry pouring some gas directly in and try to see if it will start. If it does you know the problem is within the Carb.
mike
07-12-03, 10:33 AM
#7
Yeah, I had that exact problem when I started on my 4-year sitting rex. The guys are right about what to try first, pouring a little gas down the carb. It just needs a trickle, and should run for a few seconds on that.
Now obviously that isn't a permanant fix. We toyed with the idea of tying my friend michel to the hood, cutting a hole and having *him* be our gas pump, but at 100+km/h, we don't think he could hold on enough. All this will do is point the problem towards the carb.
I'd suggest that if you're anywhere near someone who could rebuild your carburetor properly, buy a kit from Victoria British, and get them to rebuild it for ya. I bought a 'new-to-me' carb off someone, and am *still* having problems with it.
Jon
Now obviously that isn't a permanant fix. We toyed with the idea of tying my friend michel to the hood, cutting a hole and having *him* be our gas pump, but at 100+km/h, we don't think he could hold on enough. All this will do is point the problem towards the carb.
I'd suggest that if you're anywhere near someone who could rebuild your carburetor properly, buy a kit from Victoria British, and get them to rebuild it for ya. I bought a 'new-to-me' carb off someone, and am *still* having problems with it.
Jon
Trending Topics
07-12-03, 11:09 AM
#8
Full Member
Thread Starter
Join Date: Jun 2002
Location: Ottawa, Canada
Posts: 142
Likes: 0
Received 0 Likes
on
0 Posts
It's EFI so couldn't try the gas in the carb <grin>, but I figured for what it took to pop off the front wire, I'd make sure it wasn't flooded...
Started right up...boy do I feel stupid...
Started right up...boy do I feel stupid...
07-13-03, 09:01 PM
#10
Full Member
Thread Starter
Join Date: Jun 2002
Location: Ottawa, Canada
Posts: 142
Likes: 0
Received 0 Likes
on
0 Posts
Found out why I had the paradox (dry plugs, but "flooded" re-start procedure was working!)
Turns out I had a broken wire (inside the insulation) on the secondary wire running from the front ignition coil to the EFI system.
Also kills the gremlin that was Vacuum or valve problem, I think... although this is an assumption at the minute.
Thanks for all the help, especially the feedback to check something I KNEW was OK.
Turns out I had a broken wire (inside the insulation) on the secondary wire running from the front ignition coil to the EFI system.
Also kills the gremlin that was Vacuum or valve problem, I think... although this is an assumption at the minute.
Thanks for all the help, especially the feedback to check something I KNEW was OK.
Thread
Thread Starter
Forum
Replies
Last Post
joel(PA)
Group Buy & Product Dev. FD RX-7
8
10-04-15 06:07 PM