 getting a hesitation at @ 4000-4500rpm on accel, 2.0 d-jet 75, mostly new F.I. stuff , TPS board new etc |
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| DRPHIL914 |
 Oct 4 2011, 08:34 AM
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Dr. Phil  Group: Members Posts: 5,912 Joined: 9-December 09 From: Kennesaw, GA Member No.: 11,106 Region Association: South East States 
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After replacing the tps board i no longer get that bucking etc when just cruising along, but i still get this once and a while under heavy load, like acceleration , top end of 3rd or 4th gear.
and i'm wondering since this does not happen when just cruising, that is could be the richness setting of full load from the MPS?? MY MPS is a correct used one- tests good and vac is good.no leak, but i bought used , someone pulled this and re-sealed it, and the epoxy plug is missing, and when i first put it in it was very heavy on the lean setting. I have since adjusted the small screw for the idle and across the board richness. and now have a very steady proper warm idle. could be the full load setting is off, , or could the TPS still not be quite set exact? (also running a electronic spark module- hot-spark, ) all new plugs wires coil seals etc etc etc, no exhaust leaks- new SSHE with triad exhaust 1 year old. any other suggestions. - could the advance/timing be off just enough that this would not show unless at full load last timed 250 miles ago was right on, and this was there at that time too. thank s for advice. phil |
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| avidfanjpl |
Oct 12 2011, 09:33 PM
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914 Hemophiliac Group: Members Posts: 720 Joined: 6-April 10 From: Bear, Delaware Member No.: 11,566 Region Association: MidAtlantic Region |
2 Things to check
Make sure the #3 ignition wire is NOWHERE near the MPS. Causes trouble for sure. Consider putting a Pertronix unit in the dizzy. ALL of my troubles at hard acceleration DISAPPEARED FOREVER. I have had a lot of DJets, and these two items are amazing results. Others have strongly agreed here over the years. Good luck! John |
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Posts in this topic
Philip W. getting a hesitation at @ 4000-4500rpm on accel Oct 4 2011, 08:34 AM
mburkhart My car was doing something very similar - slight b... Oct 4 2011, 09:46 AM
Philip W. Thanks for the tip. Could be a bad wire, I just pu... Oct 4 2011, 10:30 AM r_towle
After replacing the tps board i no longer get tha... Oct 4 2011, 10:49 AM Philip W.
After replacing the tps board i no longer get th... Oct 4 2011, 11:05 AM Racer Chris
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what i need is a A/f meter to see where thi... Oct 4 2011, 07:39 PM Philip W.
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what i need is a A/f meter to see where th... Oct 4 2011, 07:47 PM Racer Chris
Thanks for the tip, chris. I know that is what I ... Oct 5 2011, 11:47 AM r_towle you can take your MPS and send it to Geoff Bleysin... Oct 4 2011, 11:21 AM Philip W.
you can take your MPS and send it to Geoff Bleysi... Oct 4 2011, 11:48 AM 914_teener
you can take your MPS and send it to Geoff Bleysi... Oct 4 2011, 03:24 PM Philip W. Well, increased the upper end richness setting and... Oct 4 2011, 03:07 PM porsche913b_sp
Well, increased the upper end richness setting an... Oct 5 2011, 12:54 PM porsche913b_sp Sorry 1 more question which direction is richen an... Oct 5 2011, 12:59 PM Philip W.
Sorry 1 more question which direction is richen a... Oct 5 2011, 01:19 PM r_towle with a meter you should see it sit mostly rich...a... Oct 5 2011, 04:06 PM Racer Chris
with a meter you should see it sit mostly rich...... Oct 5 2011, 06:33 PM tradisrad I am looking to add a wideband O2 to my 914. does ... Oct 12 2011, 02:38 PM |
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