 Another 'bucking' question…. |
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| Larmo63 |
 Nov 13 2014, 07:30 PM
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Advanced Member  Group: Members Posts: 4,267 Joined: 3-March 14 From: San Clemente, Ca Member No.: 17,068 Region Association: Southern California  |
After the third set of old heat exchangers on my '73 1.7 FI, I finally buttoned up exhaust leaks and now the car has started bucking/hesitation. All new ignition parts, timing, TPS exchanged with a new one, no difference. No known vacuum leaks. I can drive the car and it has power, but I have to drive "around" the hesitations. Fuel pump was replaced too. I'd like it to run better while I finish the 2056 carb engine. Ideas? (IMG:style_emoticons/default/headbang.gif)
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| 57lincolnman |
Nov 14 2014, 09:03 PM
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Member Group: Members Posts: 174 Joined: 14-September 10 From: Los Angeles Member No.: 12,175 Region Association: Southern California |
QUOTE(Larmo63 @ Nov 13 2014, 05:30 PM)  After the third set of old heat exchangers on my '73 1.7 FI, I finally buttoned up exhaust leaks and now the car has started bucking/hesitation. All new ignition parts, timing, TPS exchanged with a new one, no difference. No known vacuum leaks. I can drive the car and it has power, but I have to drive "around" the hesitations. Fuel pump was replaced too. I'd like it to run better while I finish the 2056 carb engine. Ideas? (IMG:style_emoticons/default/headbang.gif) You might look at the temperature head sensor. Mine went out and I had similar problems on acceleration. Initially I thought it was fuel pressure, dizzy, coil, wiring harness, the ECU It ended up being the temp head sensor which went out. It's a $15 part but can play havoc on the car's performance if it is not working properly. Once it was replaced, all of the bucking problems I experienced went away. My problems started out being worse when the car was cold but then subsided once the car was warmed up. Later on, it happened consistently when the car was accelerating... couldn't even get up a hill. If you do replace it, make sure it is threaded and seated properly. |
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Posts in this topic
Larmo63 Another 'bucking' question…. Nov 13 2014, 07:30 PM
krazykonrad My guess is the MPS diaphragm has worn out. That c... Nov 13 2014, 08:28 PM mepstein Check all grounds and electrical connections aroun... Nov 13 2014, 08:33 PM 914_teener
After the third set of old heat exchangers on my ... Nov 13 2014, 08:36 PM r_towle Describe the bucking in more detail....
Accel or ... Nov 13 2014, 09:09 PM Larmo63 Mostly during acceleration. It doesn't want to... Nov 14 2014, 09:38 AM rjames Check all fuel delivery items from the filter to t... Nov 14 2014, 11:12 AM Larmo63 We only worked on sealing up the intake system. Ne... Nov 14 2014, 06:31 PM
Jasfsmith
We only worked on sealing up the intake system. N... Nov 17 2014, 08:59 AM
Philip W.
We only worked on sealing up the intake system. N... Nov 19 2014, 07:04 AM Gcotton92203 I had that problem twice. I found a leak at the va... Nov 14 2014, 06:43 PM r_towle Sounds lean.
Check injector seals?
Not visible, bu... Nov 14 2014, 06:59 PM larss Did you change to a new TPS or only to a new TPS c... Nov 15 2014, 12:27 AM dknechtly Since it's on acceleration, check that your va... Nov 17 2014, 08:43 AM colingreene quote name='dknechtly' date='Nov 17 20... Nov 19 2014, 03:38 AM Philip W. my last TPS was a replacement board and brand new,... Nov 19 2014, 06:47 AM |
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