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My V8 miss 

 

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 Post subject: My V8 miss
Posted: Sat May 19, 2007 12:11 pm 
Parts Gopher
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I have a AU2 v8 I have had it for 3 month. It has a little miss under slight load. In the morning it acts like a wild pig until it warms up. I took it back to ford and they told me it was normal.It is a manual.
Can sameone give me a area to start look for the problem I was thinking injectors.

 

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Posted: Sat May 19, 2007 12:32 pm 
Getting Side Ways
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Coolant temp sensor ??
Check codes?? I assume they did???
Going by the Ford adds who say they do wheel alignments by black tyre marks on concrete ??
I assume ?? They did the same test by "looking" at engine???
Clean injectors, clean maf, check inlet temp sensor..
Check TPS sensor ???
Check or replace leads and plugs....

 

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331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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Posted: Sat May 19, 2007 1:07 pm 
Parts Gopher
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The computers said it was OK.
How needs a mach
Not ford

 

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Posted: Sat May 19, 2007 2:26 pm 
Getting Side Ways
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Check compression?? Could be broken valve spring ??? Being manwell or auto has NOTHING to do with it...
Typical symptom of weak spark....

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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 Post subject: v8
Posted: Sun Jun 24, 2007 10:33 pm 
Oompa Loompa
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SA, Australia

sounds like a similar prob to my dads au.
iddle with a miss but give it a few revs shed come good wound up being a lead. new set of spark leads then it was good as gold.
hope this helps. dont pass out by the price of them though. :evil: :twisted:
i almost did,hunted around after market ones for them.
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Posted: Sun Jun 24, 2007 10:48 pm 
Getting Side Ways
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my xr had the same problem when i bought it. wouldn't run when it was cold (had to hold the throttle open slightly till it warmed up) had a massive misfire when under any sort of load.

anyway i gave it a major service changed leads, plugs dizzy cap, and rotor button and now shes all sweet.

but from what your describing it sounds like its due to a weak spark. check if there are any burn marks on the leads at all and also do a resistance check

failing this check spark plugs dizzy cap and rotor button

 

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Posted: Mon Jun 25, 2007 12:02 am 
Getting Side Ways
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Age: 64

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Power: 482 rwkw

Location: Penrith
NSW, Australia

Check and clean maf also ???
Leads etc should be replaced as normal service...
Of say ?? Every 80,000 kmrs....
Check EGR for coolant leaks.. They can corrode and leak coolant into manifold / engine ???

 

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As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

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