 Car running like crap, 4 days before Hershey |
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| saigon71 |
 Apr 16 2019, 07:29 PM
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#1
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Advanced Member  Group: Members Posts: 2,019 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region 
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Could use some "check this" help:
Running a 2056 D-jet. Over the winter I adjusted the valves and changed the oil. It didn't need much else. This Spring, I installed a new distributor cap and new set of points. Adjusted dwell to 50 degrees before setting timing dead on at 27 degrees BTDC. The car was running awesome. (IMG:style_emoticons/default/driving.gif) All of the sudden, the car has developed a pretty serious intermittent miss. There have been times it runs flawless on a test drive, only to start sputtering the next drive. When the sputtering and bucking occurs, there is sometimes an audible "pop" or "knock" sound coming from the engine bay. I've got a new FI wiring harness from Jeff Bowlsby installed. So far I have done the following: -Check fuel lines for kinks -Added "Star-Tron" enzyme fuel treatment to fuel stored in tank for winter, have since added two tanks of fresh gas -Fuel steady pressure at 31PSI (but I couldn't get the car to act up when I had the gauge attached) -Verified point gap hadn't changed after setting dwell -Verify that CHT is tight (CHT is almost new) -Cleaned & adjusted trigger points -Unplugged TPS - it did not make a difference -Checked FI harness grounds at the back of the engine -Pulled all 4 spark plugs to check for fouling - they all looked good -Swapped the coil with a known good one Any advice on other things to check would be appreciated. |
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| ejm |
May 5 2019, 12:05 PM
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#2
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I can see the light at the end of the tunnel Group: Members Posts: 2,712 Joined: 3-February 03 From: Massachusetts Member No.: 224 Region Association: None |
You need to check the voltage at coil terminal #15 and maybe at pin 1 of the white 4 pin FI harness plug on the relay board. High resistance somewhere will reduce voltage to the consumers. I would plug another ignition switch into the harness and see if the problem goes away.
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| saigon71 |
May 5 2019, 12:57 PM
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#3
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Advanced Member Group: Members Posts: 2,019 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region
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QUOTE(ejm @ May 5 2019, 02:05 PM)  You need to check the voltage at coil terminal #15 and maybe at pin 1 of the white 4 pin FI harness plug on the relay board. High resistance somewhere will reduce voltage to the consumers. I would plug another ignition switch into the harness and see if the problem goes away. Thanks Ed. 13.7V on terminal 15 of the coil. Which pin is pin 1 on the white 4 pin FI harness? Heading out to swap out the ignition switch. |
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Posts in this topic
saigon71 Car running like crap Apr 16 2019, 07:29 PM
Minerva's 914 I would check the points, it's a cheap and eas... Apr 16 2019, 07:36 PM
Big Len
I would check the points, it's a cheap and ea... Apr 16 2019, 08:01 PM
wndsrfr
I would check the points, it's a cheap and ea... Apr 17 2019, 06:07 AM VaccaRabite When the car is acting up, put a timing light on t... Apr 17 2019, 06:30 AM rgalla9146 Not mentioned: plenum and intake manifolds for va... Apr 17 2019, 07:29 AM dr914@autoatlanta.com can you get it to do it when the car is stationary... Apr 17 2019, 07:44 AM saigon71
can you get it to do it when the car is stationar... Apr 17 2019, 10:39 AM dr914@autoatlanta.com so rev the engine and pull one spark plug wire at ... Apr 17 2019, 10:56 AM Spoke Does the tach bounce or jump when this happens? So... Apr 17 2019, 10:56 AM saigon71
Does the tach bounce or jump when this happens? S... May 12 2019, 10:40 AM saigon71 Update:
The trigger to the poor running is turnin... Apr 17 2019, 06:36 PM Spoke Where are you measuring the 13.6V and 12.5V when r... Apr 17 2019, 07:17 PM saigon71
Where are you measuring the 13.6V and 12.5V when ... Apr 17 2019, 07:36 PM Spoke
Where are you measuring the 13.6V and 12.5V when... Apr 17 2019, 07:37 PM saigon71
[quote name='saigon71' post='2706320' date='Apr 1... May 5 2019, 11:30 AM saigon71
Where are you measuring the 13.6V and 12.5V when ... May 5 2019, 11:27 AM Spoke
Where are you measuring the 13.6V and 12.5V when... May 6 2019, 06:31 PM Olympic 914 13.6 seems low.
Had a recent issue where it was ... Apr 18 2019, 07:46 AM dr914@autoatlanta.com 13.6 is great, sounds like a grounding problem, ch... Apr 18 2019, 09:43 AM ctc911ctc
13.6 is great, sounds like a grounding problem, c... Apr 18 2019, 01:22 PM saigon71 I swapped out the ignition switch with a new one. ... May 5 2019, 02:33 PM Spoke BTW, what voltage do you have at the coil with gro... May 6 2019, 08:08 PM saigon71
BTW, what voltage do you have at the coil with gr... May 12 2019, 10:58 AM saigon71 Update:
I've swapped out the distributor cap ... May 12 2019, 11:30 AM mepstein Because of what I went through I’m still guessin... May 12 2019, 12:03 PM oakdalecurtis My 76 2.0 Djet would miss intermittently for years... May 12 2019, 12:14 PM saigon71
My 76 2.0 Djet would miss intermittently for year... May 12 2019, 06:12 PM dralf I have finally started working on a similar runnin... May 15 2019, 07:41 AM JmuRiz Just a shot in the dark, how's the fuel filter... May 15 2019, 10:19 AM 904svo Just a WAG, check all the red leads on the battery... May 15 2019, 10:35 AM saigon71 Duplicate post - oops. <_< May 15 2019, 10:39 AM saigon71 I THINK (and hope) that I found what is causing th... May 15 2019, 10:39 AM VaccaRabite Its a weird problem, and I would assume that the p... May 15 2019, 07:13 PM saigon71
Its a weird problem, and I would assume that the ... May 18 2019, 03:06 PM Big Len One weird problem Bob. It's a new one for me. May 18 2019, 06:41 PM saigon71 I wanted to get plenty of driving in to make sure ... Jun 2 2019, 06:44 PM mepstein :beer2: Jun 2 2019, 06:51 PM Dion Nice one Bob. Glad they made good on the warranty ... Jun 2 2019, 07:53 PM |
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