Hard start, too much fuel cranking?
Sep 16, 2016, 05:49 PM
#1
Hard start, too much fuel cranking?
My car has some trouble starting, I need to start on WOT to rev to 2000rpm and let it go and stays on and idle fine.
If I don't go WOT turning it on, it idles low (600/800rpm) sometimes it turns off, or stays idling really low for a few seconds and then stabilizes. If it turns off and I turn it on again, I can see some black smoke.
Could it be too rich starting up? where can I lean this starting spot only?
I see some tables on fuel settings like cranking primer (first pulse), post primer enrichment 1,2,3,4,5,6. Or can I just lean the high and low octane fuel table on 500/1000 rpm?
Thanks for your help
If I don't go WOT turning it on, it idles low (600/800rpm) sometimes it turns off, or stays idling really low for a few seconds and then stabilizes. If it turns off and I turn it on again, I can see some black smoke.
Could it be too rich starting up? where can I lean this starting spot only?
I see some tables on fuel settings like cranking primer (first pulse), post primer enrichment 1,2,3,4,5,6. Or can I just lean the high and low octane fuel table on 500/1000 rpm?
Thanks for your help
Sep 18, 2016, 09:33 AM
#2
Evolved Member
My car has some trouble starting, I need to start on WOT to rev to 2000rpm and let it go and stays on and idle fine.
If I don't go WOT turning it on, it idles low (600/800rpm) sometimes it turns off, or stays idling really low for a few seconds and then stabilizes. If it turns off and I turn it on again, I can see some black smoke.
Could it be too rich starting up? where can I lean this starting spot only?
I see some tables on fuel settings like cranking primer (first pulse), post primer enrichment 1,2,3,4,5,6. Or can I just lean the high and low octane fuel table on 500/1000 rpm?
Thanks for your help
If I don't go WOT turning it on, it idles low (600/800rpm) sometimes it turns off, or stays idling really low for a few seconds and then stabilizes. If it turns off and I turn it on again, I can see some black smoke.
Could it be too rich starting up? where can I lean this starting spot only?
I see some tables on fuel settings like cranking primer (first pulse), post primer enrichment 1,2,3,4,5,6. Or can I just lean the high and low octane fuel table on 500/1000 rpm?
Thanks for your help
What is your coolant temp
And Atmospheric temp
Sep 19, 2016, 06:00 PM
#4
Evolved Member
If the car is tuned it might need some adjustments to the cranking injector pulse with for the high heat. Just a thought.
Sep 19, 2016, 06:01 PM
#5
Evolved Member
Trending Topics
Sep 21, 2016, 05:47 AM
#9
Car is tuned, via email from a reputable vendor a few years back
I already lowered cranking primer and same thing.
Car does have cams (GSC S2), Fuel pump is a walbro 255, injectors PTE 1200cc, stock fuel pressure regulator, stock MAF, intake and intercooler pipes are the injen kit, fuel is straight pump (95 oct here in Venezuela, that should be like a US 91 oct)
I already lowered cranking primer and same thing.
Car does have cams (GSC S2), Fuel pump is a walbro 255, injectors PTE 1200cc, stock fuel pressure regulator, stock MAF, intake and intercooler pipes are the injen kit, fuel is straight pump (95 oct here in Venezuela, that should be like a US 91 oct)
Sep 21, 2016, 12:24 PM
#10
OK Put the cranking IPW to the stock settings then Multiply by 0.5
you want about half of the stock cranking IPW the injectors flow a little more than double stock but theyre latency is higher also.
for reference i tuned a car on DW 1200 and got
temp ms
-26 226.3
-0 108.1
18 46.4
45 17.3
68 15.4
93 12.4
122 6.7
171 3
180 2
it starts a little rich but, its very close.
these might be close enough for you to get somewhere, also if it starts easier with throttle then you need less fuel.
you want about half of the stock cranking IPW the injectors flow a little more than double stock but theyre latency is higher also.
for reference i tuned a car on DW 1200 and got
temp ms
-26 226.3
-0 108.1
18 46.4
45 17.3
68 15.4
93 12.4
122 6.7
171 3
180 2
it starts a little rich but, its very close.
these might be close enough for you to get somewhere, also if it starts easier with throttle then you need less fuel.
Sep 23, 2016, 06:12 PM
#12
OK Put the cranking IPW to the stock settings then Multiply by 0.5
you want about half of the stock cranking IPW the injectors flow a little more than double stock but theyre latency is higher also.
for reference i tuned a car on DW 1200 and got
temp ms
-26 226.3
-0 108.1
18 46.4
45 17.3
68 15.4
93 12.4
122 6.7
171 3
180 2
it starts a little rich but, its very close.
these might be close enough for you to get somewhere, also if it starts easier with throttle then you need less fuel.
you want about half of the stock cranking IPW the injectors flow a little more than double stock but theyre latency is higher also.
for reference i tuned a car on DW 1200 and got
temp ms
-26 226.3
-0 108.1
18 46.4
45 17.3
68 15.4
93 12.4
122 6.7
171 3
180 2
it starts a little rich but, its very close.
these might be close enough for you to get somewhere, also if it starts easier with throttle then you need less fuel.
102
68
41
35
30
10
4
2
1
1
1
If I copy and paste I get some different numbers
102.384
68.256
41.472
34.992
29.808
10.368
3.888
2.16
0.864
0.864
0.864
