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Idels all over the show ((EF falcon 4.0L)) 

 

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 Post subject: Idels all over the show ((EF falcon 4.0L))
Posted: Sat Sep 08, 2007 8:36 pm 
Getting Side Ways
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Ride: EF V8 Futura, 180sx

Location: Brisbane, Burpengary
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Car ideling like a bucket of....

when i start it up it runs around 700rpm then it just loses the plot and idel goes down to 500 and back up to 700 then back down and then back up and there fuel comming out the exhaust...

what do you guys think causing it??? stuffed coil pack? coolant temp sensor? o2 sensor????

Cheers,
Jason

 

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Posted: Sat Sep 08, 2007 8:37 pm 
Getting Side Ways
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Ride: EF V8 Futura, 180sx

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i just did a on/off test for faults and got IAT voltage to high.

im getting a multimeter right now to test the volt.

do you guys think that this could cause it????

 

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18" koya Strykers, AU engine with port and polish EB head, crow valve springs, standard cam, Large aftermarket RX7 turbo, T5 manual 3" intercooler piping, 600x300x100 intercooler core, MSII with innovate wideband O2 sensor and guage. BA F6 bodykit

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Posted: Sat Sep 08, 2007 8:47 pm 
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no idea
but i would pull off the ISC ( idle speed controller and give that a damn good clean with carby cleaner

if u are not sure what it is it is the cylinder thing on top of the throttle body! with 2 wires coming out

 

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Posted: Sat Sep 08, 2007 9:13 pm 
Getting Side Ways
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just clean the ISC and maybe the throttle body with some throttle body cleaner. besides that reset the ecu, there should be a tutorial on here how to do it.

 

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Posted: Sat Sep 08, 2007 10:14 pm 
Getting Side Ways
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Ride: EF V8 Futura, 180sx

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LOL

shame shame shame same old answers
clean ya ISC or check/replace ya spark plugs
cheack leads
check air filter
replace fuel filter
clean throttlebody
i did that ages ago that like a first step thing

well i beleave i have fix the problem
that fault i got with the IAT well i check for 5V in the IAT and there wasn't any power went to the ecu to check for power and found the wire to be cut. Ive been driving this car around since the day i bought it(4-5month) without a IAT connected LOL ive been doing pritty good getting a 400km to a tank and out running a (mates) modded ea falcon with this problem LOL

ill give ya guys a update tomorrow when i go for a good drive and see how she runs

 

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18" koya Strykers, AU engine with port and polish EB head, crow valve springs, standard cam, Large aftermarket RX7 turbo, T5 manual 3" intercooler piping, 600x300x100 intercooler core, MSII with innovate wideband O2 sensor and guage. BA F6 bodykit

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Posted: Wed Sep 12, 2007 4:50 pm 
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hey wats the IAT cause i have the same idle problem any help thanks

 

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Posted: Wed Sep 12, 2007 6:34 pm 
Getting Side Ways
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Ride: EF V8 Futura, 180sx

Location: Brisbane, Burpengary
QLD, Australia

LOL i proberly not ya IAT(Intake air temp)
the prvious owner of the car was a complete idiot and had no idea what he was doing and cut my IAT wire.

all your sensors(throttle position, crank angle sensor, cam angle sensor, map sensor, IAT, o2 sensor, coolant temp sensor and so on) get a 5v feed which the sender what ever one it is make a resistance that the computer understands and sends back to the ecu to adjust fuel load to mae the right ratio for whatever rpm and throttle postion your at.

if you cleaned ya ISC(idel solinoid control) and reset ya base(700rpm + or - 100rpm) idel and done the raw basic tune up(dizzy) timming light
then try this

if ya got a multi meter check the ecu voltages(look on top of ecu and you see that the whires are numbered)

ecu termonal 35 (02 sensor) should have 0.8V after starting engine and leting run for 60 seconds after the 60 whould fluxuate between 0.1V and 0.8V

ecu temonal 38 (coolant temp sensor) ign on at 20 degress 3.1V at 40 degress 2.2V and at 100 degress 0.5V

ecu termonal 39 (IAT) ign on at 0 degress 3.9V and at 20 degress 3.1V and at 40 degress 2.2V

there some basic tests ya can do to check your engine for that bad idel.

hope that helps and not confused you

 

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18" koya Strykers, AU engine with port and polish EB head, crow valve springs, standard cam, Large aftermarket RX7 turbo, T5 manual 3" intercooler piping, 600x300x100 intercooler core, MSII with innovate wideband O2 sensor and guage. BA F6 bodykit

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Posted: Thu Sep 13, 2007 12:24 am 
Fordmods Junkie
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maf sensor hose from it to manifold, simple check, the hose comes off occasionaly on my car and this happens.

just another idea for you to ponder over

 

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