[Home | Mail Archive | Join the mail archive | Photo Gallery ]

Mazda Rotary Pickup Forum
you are logged in as
profile | register | faq | search (active threads) | memberlist
Sponsored by:
Index > Engine/Drivetrain > Thread: Engine idles badly
Thread: Engine idles badly
Rotary_Pickup


Hauling
Posts: 117
posted March 06, 2004 04:42 PM

Engine idles badly

I have to use starting fluid to get my engine to start. I can hear the fuel pump running and it appears that the engine is getting gas. It does start right up once I use the starting fluid. Also, it does not want to idle. I have to play with the choke. If I leave the choke out, it will idle at about 1.2 grand on the tach. On suggestions on maybe tweaking the carb?

This is the first time Iíve messed with my truck since buying it off eBay in January. I plan on doing a full restoration but would like to drive it for a year before I start the process.

       
View IP (Administrators only)
Jeff20B


Moderator
Posts: 661
posted March 06, 2004 11:14 PM

Vacuum leak. It runs when the choke is pulled because the air leaking in is mixing with the fuel and running the engine. Check around for old hard cracked hoses and vacuum caps on the carb, carb spacer (if applicable) and manifold. I had a problem similar to you once, and fixed a vacuum leak.
____________
'74 REPU
'76 Cosmo
'77 MG Midget 13B
'81 RX-7

       
View IP (Administrators only)
Rotary_Pickup


Hauling
Posts: 117
posted March 07, 2004 10:12 AM

The previous owner removed the airpump but did not put plates on any of the openings. They just left the hoses in place. Could this be the problem? If so, I can just make some plates to block the openings.

       
View IP (Administrators only)
Jeff20B


Moderator
Posts: 661
posted March 07, 2004 11:57 AM

Sure, I guess. Is there still a thermal reactor?
____________
'74 REPU
'76 Cosmo
'77 MG Midget 13B
'81 RX-7

       
View IP (Administrators only)
ovquick


Redlining
Posts: 253
posted March 07, 2004 01:08 PM

Poor Idle

Poor or no idle except with the choke on or partially on could also be from plugged idle air bleeds.

       
View IP (Administrators only)
Rotary_Pickup


Hauling
Posts: 117
posted March 07, 2004 02:55 PM

It has a header going to dual exhaust.

       
View IP (Administrators only)
Klaus43


Rotorhead
Posts: 1259
posted March 08, 2004 08:22 AM

I've been cautioned

NOT to use starting fluid on rotaries... something about saving the seals... stands to reason there might be issues with washing the oil from the housing, potential for detonation, etc. ...
Other than that, if a thorough 'search and destroy' for vacuum leaks doesn't do it: time to see what's in your carb!

       
View IP (Administrators only)
Jeff20B


Moderator
Posts: 661
posted March 08, 2004 11:17 AM

That makes sense since pouring a little oil down the carb basically accomplishes the same thing, only it does protect the seals. There is less to combust when using oil instead of that ether stuff, but it lets you know there's a problem somewhere else (weak ignition, no fuel or what have you).
____________
'74 REPU
'76 Cosmo
'77 MG Midget 13B
'81 RX-7

       
View IP (Administrators only)
All times are PST (US)
Post New Topic    Post New Reply
Rate Topic:
Powerd By: BlazeBoard

[Home | Mail Archive | Join the mail archive | Photo Gallery ]
0.017429113388062 seconds processing time