Au Fairmont V8

[BHDOGS]

Hey all i have just brought a v8 fairmont au series 2 on gas from a car yard on gas it backfires and dies during acceleration and on petrol it runs but while accelerating it stutters or hesitates but doesnt stall its done 180,000 kms also im new to v8s so was wondering wat cheap mods can be done to it it came with genie headers and a 2 and 1/2 inch exhaust and its auto

[portokatsiki]

hey there
my nl fairlane v8 on gas had the same symptons I changed plugs leads rotor button and dizzy cap and fixed all the backfiring on gas. Yours being a AU hasnt got a dizzy its got coil packs which are more expensive (not sure if you have to change the coil packs I would) on the petrol side of things I had to change the mass air flow meter. The backfiring on gas damaged the element inside the mass airflow meter hope this helps

[mongrelEF]

I wouldn't change the coil pack unless you have to - did one a few months ago for a customer and the cheapest he could get it was about $700!
Plugs and leads first, also use a timing light to check the harmonic balancer hasn't spun. That's more common on the EF/EL v8s, but worth checking anyway.

[b2tf]

Originally Posted by mongrelEF

I wouldn't change the coil pack unless you have to - did one a few months ago for a customer and the cheapest he could get it was about $700!

Then he's not looking hard enough. Motorcraft ones for around $200 on Ebay or better still MSD Ignition coils which are a straight fit and better quality.

[portokatsiki]

Forgot to add after doing all that took the car to a gas place and put the car on the analyzer to adjust the mixtures
I bought a set of MSD coils off ebay usa 2 months ago for $185 delivered

[BHDOGS]

ive had a look properly theres a little hole up the top of the intake pipe with nothing in it near the throttle body? also after intake and exhaust what mods are next on a windsor? any point in a tune at this early stage?

[peterban]

Should be a plug in air temp sensor that pushes into the hole.

[mongrelEF]

Originally Posted by b2tf

Then he's not looking hard enough. Motorcraft ones for around $200 on Ebay or better still MSD Ignition coils which are a straight fit and better quality.

Heh, I won't tell him that now, it'd just upset him. That's why I get people to find their own bits, that way I don't get yelled at!

[BHDOGS]

Ah an air temp sensor thats obviously the char grilled wire and plug that was hanging next to my extractors after being left out no doubt could this be causing the surging and bad acceleration or stalling on gas?

[b2tf]

Originally Posted by BHDOGS

Ah an air temp sensor thats obviously the char grilled wire and plug that was hanging next to my extractors after being left out no doubt could this be causing the surging and bad acceleration or stalling on gas?

Yep - if it falls out of the pipe it's usually cooked on #4 extractor pipe.

[BHDOGS]

haha thats exactly the one b2tf if i buy another one shouldnt i be able to just wire it into the excisting good wires and it will run fine?

[b2tf]

Originally Posted by BHDOGS

haha thats exactly the one b2tf if i buy another one shouldnt i be able to just wire it into the excisting good wires and it will run fine?

Yep, did the plug on the end of the loom get melted? Might be a bit trickier if it did.

[BHDOGS]

yeh the whole thing and half the wire up to the loom connection has been fried also would putting a bigger maf and throttle body onto my car make it breath better and would a bigger replacement fit onto the existing manifold and maf black box?

[BHDOGS]

Well putting a new air intake sensor on has fixed the issue haha but since putting on a bigger snorkle and k/n filter the gas has gone abit crap again its this due to the extra air now getting into the intake and would need another gas tune?