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> 1976 2.0 question, throttle body
jimkelly
post Jan 7 2006, 09:41 PM
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Up untill a few days ago my car was running fine but all of a sudden it started to back fire when I decelerated and starting it became difficult. One thing that has been found is the both the vaccum hoses - light blue and the red to the distributor - both pull vaccum at idle and both lose vaccum when giving the motor some throttle. The red is supposed to have little vaccum at idle and gain vaccum with added throttle - correct? We are thinking that my throttle body has gummed up hole some where but at this moment we don't know how the advance hose nipple is plumbed in the 1976 2.0 throttle body - anyone got any ideas or a detailed drawing of how the advance vaccum flows through it? Thanks, Jim


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Bleyseng
post Jan 10 2006, 09:38 AM
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QUOTE (jimkelly @ Jan 10 2006, 04:15 AM)
My understanding is the adjustment screw on the ecu is for idle only and does not effect motor at above idle ?? Jim

My problem has been solved - thanks to rtowle - my mps was BAD : ( but I had an extra : )

The ECU screw only adjusts the mix at idle but it can affect the mix when the throttle is closed on decel IIRC.
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jimkelly   1976 2.0 question   Jan 7 2006, 09:41 PM
jimkelly   TB   Jan 7 2006, 09:41 PM
Bleyseng   Advance hose from the dizzy is plugged and just la...   Jan 8 2006, 12:15 AM
jimkelly   I could be mixed up but I think we determined that...   Jan 9 2006, 01:36 PM
r_towle   I hate to say this...but check your MPS...pull off...   Jan 9 2006, 02:20 PM
jimkelly   I have a spare MPS - I'll give that a try. Tha...   Jan 9 2006, 02:43 PM
Rand   If you connect a vacuum gauge to that nipple with ...   Jan 9 2006, 02:48 PM
jimkelly   We get a vaccum reading at idle - but it dropps of...   Jan 9 2006, 02:50 PM
Rand   Vacuum at idle but not at throttle = port below bu...   Jan 9 2006, 02:54 PM
Dave_Darling   <...   Jan 9 2006, 02:55 PM
jimkelly   rand - yes - vaccum at idel - it drops off with th...   Jan 9 2006, 03:03 PM
r_towle   the vacuum advance circuit would only need to prod...   Jan 9 2006, 03:06 PM
Rand     Jan 9 2006, 04:33 PM
Cap'n Krusty   <...   Jan 9 2006, 04:45 PM
jimkelly   Well I changed the mps and things are better but n...   Jan 9 2006, 05:06 PM
jimkelly   pic   Jan 9 2006, 05:07 PM
Rand  
  Jan 9 2006, 05:09 PM
jimkelly   Captain wrote opposite Dave - I had to ask despite...   Jan 9 2006, 05:34 PM
Rand   Gotchya... I have read the factory left it UNplug...   Jan 9 2006, 05:39 PM
Bleyseng   <...   Jan 9 2006, 07:31 PM
Bleyseng   pic   Jan 9 2006, 07:37 PM
Dave_Darling   <...   Jan 9 2006, 07:45 PM
Bleyseng   Lookat the 73 2.0 Throttle body with the two ports...   Jan 9 2006, 07:53 PM
jimkelly   Thanks to you guys my baby is feeling a lot better...   Jan 9 2006, 07:56 PM
motorhead   this is interesting! I've had the advance ...   Jan 9 2006, 09:58 PM
jimkelly   My understanding is the adjustment screw on the ec...   Jan 10 2006, 06:15 AM
Bleyseng   ...   Jan 10 2006, 09:38 AM
jimkelly   On my 1976 2.0L I changed my bad 043 mps to a good...   Jan 15 2006, 10:24 AM
Bleyseng   Its because in the first 10 mins of driving the en...   Jan 15 2006, 10:33 AM
jimkelly   geoff, I have a 043 mps that I got from skline an...   Jan 15 2006, 11:05 AM
Bleyseng   If the 043 is bad then its waay to rich so the mot...   Jan 15 2006, 11:49 AM

 

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