Author Topic: diagnostic reader help  (Read 650 times)

Offline hayesey

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Re: diagnostic reader help
« Reply #30 on: July 10, 2018, 01:10:47 pm »
I don't think that list from that other thread has the correct numbers any more.  They look like a conversion to utf-8 characters gone wrong.  It's a really old post from 2008 and we've changed forum software since then which involved importing all the old data, some character set conversion errors happened.


Offline steveo3002

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Re: diagnostic reader help
« Reply #31 on: July 10, 2018, 02:05:45 pm »
update...replacement afm with anti tamper seals intact...still same

bad idle and no hot starts , drives normal ish anything above idle

Offline steveo3002

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Re: diagnostic reader help
« Reply #32 on: July 11, 2018, 11:30:40 am »
updated info

bad idle,bit bumpy pop pop sound  and refuses to start hot - between 3-20 mins , will start with bts undone , drives fairly okay above idle

a few things ive tried /done

timing set as per the book
air bypass mixtured tired various settings ...its set to 14.1 afr via a wideband gauge at the moment
tried another dizzy /cap/arm
tried another coil
correct plugs fitted
earths good
tried another tps
no obvious air leaks + charcoal can deleted
correct 3 bar pump fitted
new genuine blue sender plus tried others i had laying around
spare set of used inj tried with new o rings
spare afm tried
blocked the isv at the tb elbow- no change in running

engine basics should be fine as ive had the car driving for 2 years on a carb ..ive not touched the internals since

still waiting on a ecu to try...them im pretty much out of ideas

Offline hayesey

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Re: diagnostic reader help
« Reply #33 on: July 11, 2018, 12:07:16 pm »
Quote
bit bumpy pop pop sound

do you mean it's misfiring?

Offline steveo3002

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Re: diagnostic reader help
« Reply #34 on: July 11, 2018, 01:27:40 pm »
i guess it must be an intermitant mis , note changes if i pull the plug lead so its not a complete misfire

drives normal enough no hint of misfire or jekryness

pretty much sounds like a cross between del boys three wheeler and a muscle car with the lumpy idle

see what happens when the ecu turns up...if i had to say whats wrong its like when entering set up mode with the bts off , its ignoring it , timing and mixture out , but its not ?    wideband holds a steady reading , not sure it would if bad misfire ?
« Last Edit: July 11, 2018, 01:31:28 pm by steveo3002 »

Offline steveo3002

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Re: diagnostic reader help
« Reply #35 on: July 12, 2018, 03:59:09 pm »
right

just the same on spare ecu

tried spare tb , fpr and ran some new wires all the way from blue sender to ecu

no change..

have also fitted o2 sensor now

cant think of anything else to try ?  rebuild loom or mess with afm spring
« Last Edit: July 12, 2018, 04:08:15 pm by steveo3002 »

Offline hayesey

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Re: diagnostic reader help
« Reply #36 on: July 14, 2018, 08:07:30 pm »
at a bit of a loss really.

have you tried a new set of plugs and leads?

Offline steveo3002

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Re: diagnostic reader help
« Reply #37 on: July 21, 2018, 04:47:54 pm »
yeah new correct plugs in it , tried leads etc

not sure if this is any progress or not...

i took the lid off the afm and with my finger pushed the slider around a bit more while running , sounds much nice ,and the other way sounds worse , so thinking maybe it needs a tweak to richen it ??

or any other ideas why it would be lean at idle

Offline steveo3002

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Re: diagnostic reader help
« Reply #38 on: July 22, 2018, 11:43:23 am »
any ideas on the tools needed to check fuel pressure ?

Offline ereeiz

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Re: diagnostic reader help
« Reply #39 on: July 23, 2018, 12:11:15 pm »
Get a fuel pressure gauge and fit it in your fuel line before the pipe enters the rail, this should give you an idea.

Offline hayesey

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Re: diagnostic reader help
« Reply #40 on: July 23, 2018, 01:01:55 pm »
there's a test point on the end of the fuel rail under the wiring connector.  Take the small bolt out of it and push a pipe over it (with a jubilee clip to seal it), run this to a gauge with a max of at least 50psi.

Offline steveo3002

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Re: diagnostic reader help
« Reply #41 on: July 23, 2018, 05:28:50 pm »
ah yeah...like  6mm or so bolt?  would it always be 3 bar or only at max revs?

will look for a gauge on the ebay
« Last Edit: July 23, 2018, 05:30:30 pm by steveo3002 »

Offline hayesey

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Re: diagnostic reader help
« Reply #42 on: July 24, 2018, 04:00:52 pm »
yeah it's a small bolt.

it's a 45psi pressure regulator but the running pressure is governed by vacuum and boost.  If its a GT then obviously you'll never see boost so shouldn't go much over 45psi at all.

Offline NealPeal

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Re: diagnostic reader help
« Reply #43 on: July 31, 2018, 06:21:35 pm »
Did you get the pressure tested, any luck in general?
I lost a load of fuel from the rail when I was plumbing my new £14 oil/fuel pressure tester in, but straight after, all my lumpy running problems seem to have gone. Coincidence being I'd replaced an oil pressure tester at the same time.. I think I've had some dusty old petrol go through the pump, and the pipe-burst has cleared some rubbish out, or bubbles out, but mine does seem *crack on* just over the course of a dinnertime.. Everytime I've run it out of petrol a bleeding has fixed it, I'm pretty sure now....
And I found the oil leak..! After taking the engine 1/3 out it was the camshaft sprocket-end seal in tatters...!
Cool
Neal

Offline steveo3002

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Re: diagnostic reader help
« Reply #44 on: July 31, 2018, 07:45:53 pm »
havent looked at the pressure yet(what gauge did you use)

so tonight ..messed with the afm to make it a little richer , seems slightly better but that wasnt the fault

as it stands now

bumpy idle

blue temp sender undone sweetens it alot /almost fine?

o2 sensor connected = terrible had to undo it