 Debugging stumble on acceleration when warm |
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| solex |
  Aug 23 2020, 09:16 AM
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#1
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Senior Member  Group: Members Posts: 789 Joined: 12-January 05 From: Long Island, NY Member No.: 3,439 Region Association: North East States  |
On my past few drives the car has been stumbling when I accelerate specifically when warm and in every gear except first, in my 2.0L D-Jet in a 75'
A few of things to note: - Ground strap at transmission has been cleaned - Installed a second ground at battery ground point to the engine fan - New spark plugs Bosch W175T2 - Engine compression 134-145 all cylinders - Fuel pressure set to 28 psi - spark plug new wires - 123 Ignition curve 2 with vacuum advance attached, 10 degrees advance at idle - Injectors have been rebuilt by Mr. Injector - All vacuum hoses have been replaced - AAR is in working order and has been oiled Not really sure where else to look, the engine idles < 1000 but is not smooth at times jumping +/- ~ 200 RPM Any advice would be appreciated. |
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Replies
| solex |
Aug 26 2020, 09:30 AM
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#2
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Senior Member Group: Members Posts: 789 Joined: 12-January 05 From: Long Island, NY Member No.: 3,439 Region Association: North East States |
Hey Rob,
I think I may have overstated the hunting idle, I have adjusted the ECU and mixture, it is better then I have seen it in a while. The problem I have is under acceleration in 2nd and above gears over ~ 1500 RPM. If I maintain speed there is no problem. The is bucking/stumbling when accelerating |
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Posts in this topic
solex Debugging stumble on acceleration when warm Aug 23 2020, 09:16 AM
wndsrfr Clean the contact strips on the TPS... Aug 23 2020, 09:25 AM rjames Have you tried adjusting the fuel mixture with the... Aug 24 2020, 11:04 AM
BeatNavy
Have you tried adjusting the fuel mixture with th... Aug 26 2020, 09:22 AM windforfun I had a similar problem. I found a new TPS & ... Aug 24 2020, 11:11 AM solex Thank you everyone. I just removed the TPS, which... Aug 25 2020, 10:35 AM PCH Looks like the board is worn out. 914 Rubber has n... Aug 25 2020, 11:12 AM PCH DP Aug 25 2020, 11:14 AM solex I saw the new board, looks great and will order on... Aug 25 2020, 01:23 PM solex I reinstalled the TPS and it was still stumbling, ... Aug 26 2020, 06:28 AM solex I go the new boards on Friday, 914Rubber has some ... Aug 30 2020, 07:53 AM sechszylinder Hi,
did you checked the trigger contacts which a... Aug 30 2020, 08:35 AM solex
Hi,
did you checked the trigger contacts which ... Aug 30 2020, 09:40 AM sechszylinder
[quote name='sechszylinder' post='2847084' date='... Aug 30 2020, 01:28 PM rjames Fuel pressure maybe too low, AFR could be too lean... Aug 30 2020, 10:16 AM solex This evening I did several things in attempt to fu... Sep 1 2020, 04:37 PM rjames
This evening I did several things in attempt to f... Sep 2 2020, 01:54 AM DRPHIL914
Thank you everyone. I just removed the TPS, whic... Sep 3 2020, 06:47 AM solex I removed the plenum and located a crack on the to... Sep 5 2020, 03:57 PM porschetub :idea: looks like your throttle body gasket isn... Sep 5 2020, 10:30 PM solex The crack exposed... :D
and hopefully repaire... Sep 6 2020, 10:18 AM porschetub
The crack exposed... :D
and hopefully repair... Sep 6 2020, 10:10 PM solex Got everything installed new with new boots betwee... Sep 7 2020, 01:12 PM porschetub
Got everything installed new with new boots betwe... Sep 8 2020, 07:39 PM solex
Excellent result,my experience with injection al... Sep 9 2020, 09:20 AM |
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