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> Starts out smooth, then what the buck?
Jesco Reient
post Dec 18 2013, 06:24 PM
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When I first start the car cold for the day. (2056, D-jet, Raby 9590 cam, timing 27 advance @3500) The car has no cold start valve but has not seemed to care. First start it runs smoothly pulls away from the house shifting @ 3500 it acts nicely. After warming up for awhile as the motor reaches 3200 to 3600 it bucks severely then above 3600 it smooths out a bit. Then as it gets warmer the bucking moves down the RPM range to 2600 to 2800 RPM becoming not very drivable. any ideas out there? (IMG:style_emoticons/default/confused24.gif)
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rhodyguy
post Dec 20 2013, 11:22 AM
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Chimp Sanctuary NW. Check it out.
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have you calibrated the tps using a proper plug, jumper wires, and your multlmeter?
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Jesco Reient
post Jan 22 2014, 06:59 PM
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QUOTE(rhodyguy @ Dec 20 2013, 09:22 AM) *

have you calibrated the tps using a proper plug, jumper wires, and your multlmeter?


Hey I'm back,

So The Ford motor is disassembled and I'm back in the shop with the 914,

As suggested I tried running the head temp sensor to ground to see if that changed anything, not really So it's hooked back up now.

Next I'm adjusting the TPS again with the multi-meter.

Next after that I'm checking the Manifold Pressure Sensor Diaphragm.

It feels like it's closer to carburetors everyday.
Argghhh
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rmital
post Jan 23 2014, 11:28 AM
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QUOTE(Jesco Reient @ Jan 22 2014, 07:59 PM) *

............As suggested I tried running the head temp sensor to ground to see if that changed anything, not really So it's hooked back up now.
............

just to be perfectly clear....you are NOT running the head temp sensor to ground.
you would run a wire from the pigtail connection from the harness that connects to the head sensor to ground (negative on the battery)

your taking the CHT out of the equation.
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Posts in this topic
Jesco Reient   Starts out smooth, then what the buck?   Dec 18 2013, 06:24 PM
boxsterfan   When I first start the car cold for the day. (205...   Dec 18 2013, 06:32 PM
Jesco Reient   Could be TPS worn, trigger points on dizzy or fu...   Dec 18 2013, 07:57 PM
boxsterfan   Also, how about your fuel filter? Clogged? Or a ...   Dec 19 2013, 10:57 AM
Jesco Reient   Also, how about your fuel filter? Clogged? Or a...   Dec 19 2013, 11:46 PM
r_towle   r_towle "What is your valve train setup? Al...   Dec 20 2013, 10:48 AM
r_towle   What is your valve train setup? Aluminum or chromo...   Dec 19 2013, 12:13 PM
rick 918-S   From the sounds of your last post about going thro...   Dec 19 2013, 03:44 PM
gothspeed   The above is good advice ..... the only thing I...   Dec 19 2013, 08:18 PM
rmital   The above is good advice ..... the only thing I...   Dec 19 2013, 08:36 PM
Mike Bellis   What everyone is eluding to here is you have a lea...   Dec 19 2013, 08:29 PM
gunny   I had the same type of issue and after about a yea...   Dec 19 2013, 08:29 PM
914GT   Maybe try retarding the timing a few degrees and s...   Dec 19 2013, 09:16 PM
r_towle   Runs good cold, run worse when hot. Metal expands ...   Dec 19 2013, 09:40 PM
rick 918-S   Runs good cold, run worse when hot. Metal expands...   Dec 19 2013, 10:28 PM
Jesco Reient   Runs good cold, run worse when hot. Metal expand...   Dec 20 2013, 08:41 AM
rick 918-S   You may want to re-run a test on your MAPS too jus...   Dec 20 2013, 06:42 AM
gunny   http://www.aemelectronics.com/wideband-air...-fuel...   Dec 20 2013, 07:15 AM
boxsterfan   http://members.rennlist.com/pbanders/DJetP...tm#tr...   Dec 20 2013, 10:44 AM
rhodyguy   have you calibrated the tps using a proper plug, j...   Dec 20 2013, 11:22 AM
Jesco Reient   have you calibrated the tps using a proper plug, ...   Jan 22 2014, 06:59 PM
rmital   ............As suggested I tried running the head...   Jan 23 2014, 11:28 AM
Jesco Reient   ............As suggested I tried running the hea...   Jan 23 2014, 02:44 PM
gunny   If the issue is RPM sensitive and not throttle pos...   Dec 20 2013, 11:40 AM
Jesco Reient   If the issue is RPM sensitive and not throttle po...   Dec 20 2013, 04:23 PM
Jesco Reient   Today has been a research and reading day, letting...   Dec 20 2013, 04:22 PM
Java2570   I've seen a lot of other threads with folks us...   Jan 23 2014, 07:54 AM
mepstein   I had bucking sometimes and a perfect running engi...   Jan 23 2014, 09:09 AM
Jesco Reient   I had bucking sometimes and a perfect running eng...   Jan 23 2014, 09:37 AM
r_towle   I had bucking sometimes and a perfect running en...   Jan 23 2014, 01:37 PM
Jesco Reient   OK, todays test drive revealed a nice smooth pull ...   Jan 23 2014, 07:55 PM


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