need a q45 tech asap

have problems with my 97  q45 misfiring, any good east coast techs on her?

[QUOTE=soarer718;391123]have problems with my 97  q45 misfiring, any good east coast techs on her?[/QUOTE]

[url]www.infinitihelp.com[/url]

change your valve cover gaskets,for sure your coils are full of oil.

checked gaskets,changed plugs and fuel filter, getting a po300 code and a po1140 and p01145 checked coils for spark they look good,, :(

[QUOTE=soarer718;391164]checked gaskets,changed plugs and fuel filter, getting a po300 code and a po1140 and p01145 checked coils for spark they look good,, :([/QUOTE]

regardless changing the coils is worth the investment

coils.. i would buy but they are about 90 each and i dont have that right now..lol there are 8 of them.. :(

You need to scope the primary side of the ignition on all eight coils to pinpoint which particular one is bad. The problem with them is the transistor inside the coils starts to go out and it wont fire the coil

Faulty maf will throw a misfire code sometimes. Pull yours off and clean it, clear the codes and see if it comes back.

__JER__

[QUOTE=Jer;391218]Faulty maf will throw a misfire code sometimes. Pull yours off and clean it, clear the codes and see if it comes back.

__JER__[/QUOTE]

careful if you decide to do this.  MAF are very fragile.

[QUOTE=Jer;391218]Faulty maf will throw a misfire code sometimes. Pull yours off and clean it, clear the codes and see if it comes back.

__JER__[/QUOTE]
Dude NEVER tell anybody to clean their MAF, almost every time the poor bastard involved will fuck it up =)

Slight (dunno 20psi) use of pressurized air is the only way it don't get f'ed up... It will break VERY easily, and [B]never ever[/B] wash it =)

how do i scope the coil packs? how do i test them?

[QUOTE=soarer718;391438]how do i scope the coil packs? how do i test them?[/QUOTE]
Coil packs off one at a time and spark plug in and then get your buddy to crank to see if it gives a spark. Or a "thought lamp." Eazy :biggthumpup:

[QUOTE=Juzzo;391449]Coil packs off one at a time and spark plug in and then get your buddy to crank to see if it gives a spark. Or a "thought lamp." Eazy :biggthumpup:[/QUOTE]
 
 
not exactly that way. 
 
You need to go to a shop and have them do the test with a tool called an oscilloscope. You hook up the amp probe on the primary side of the coils and it graphs how the coils are firing, with that they can pinpoint which one(s) bad

[QUOTE=ni5mo240;391463]not exactly that way. 
 
You need to go to a shop and have them do the test with a tool called an oscilloscope. You hook up the amp probe on the primary side of the coils and it graphs how the coils are firing, with that they can pinpoint which one(s) bad[/QUOTE]
True, and the oscilloscope is the only way to find out "bad coil" that's firing irregularly. But if the coil is totally gone and don't fire at all then you can spot it with that my above mentioned DIYer method.

I just feel the need to give an DIY pointer first, and of course if the op can't find the solution for his problem by himself then let the shop find it... Fixing things by one self is a dying art form, that's sad =)

[QUOTE=Blitz;391244]careful if you decide to do this. MAF are very fragile.[/QUOTE]They are a little more resilient than people think. That doesnt go to say you can throw it around or drop it, but its not a delicate little baby bird either. Lol
 
[QUOTE=Juzzo;391260]Dude NEVER tell anybody to clean their MAF, almost every time the poor bastard involved will fuck it up =)
 
Slight (dunno 20psi) use of pressurized air is the only way it don't get f'ed up... It will break VERY easily, and [B]never ever[/B] wash it =)[/QUOTE]
 I never said wash it, lol, I said clean it. I bought a can of MAF cleaner, held the spray nozzle about 8-12" away and clean the element really well. But i agree if theres too much pressure it will detach the little wire. 
 
Could also be the CAS, or the CPS causing the misfire code, maybe a faulty ignitor. I highly doubt its a coil pack.

[QUOTE=Juzzo;391556]True, and the oscilloscope is the only way to find out "bad coil" that's firing irregularly. But if the coil is totally gone and don't fire at all then you can spot it with that my above mentioned DIYer method.

I just feel the need to give an DIY pointer first, and of course if the op can't find the solution for his problem by himself then let the shop find it... Fixing things by one self is a dying art form, that's sad =)[/QUOTE]

I agree with you that he should try to fix it on his own but I suggested the oscilloscope because of the codes he is getting

[QUOTE=Jer;391592]They are a little more resilient than people think. That doesnt go to say you can throw it around or drop it, but its not a delicate little baby bird either. Lol
 

 I never said wash it, lol, I said clean it. I bought a can of MAF cleaner, held the spray nozzle about 8-12" away and clean the element really well. But i agree if theres too much pressure it will detach the little wire. 
 
Could also be the CAS, or the CPS causing the misfire code, maybe a faulty ignitor. I highly doubt its a coil pack.[/QUOTE] 

These engines don't have the igniter separately lile g50 do, each coil has its own transistor that fires the coil

Try using LS1 coilpacks. I got 8 for $75 but never attempted it...pretty confident it would work. Only downside is having to cut and rewire the connectors and make a coilpack bracket...and plug wires too.  Still way cheaper and they are superior coilpacks.

The techs at the dealership chase this problem all the time on our cars.  everything mentioned can be a cause...yet you can do weverything mentioned and still not fix it sometimes too.  G/L

changed 4 bad coils and still the same lol car is for sale lol im done getting a y34... thanks guys for your help,