Monster hesitation across the powerband in the Z

[Mook]

car has ran like a top since ive owned it (minus things beyond its control). leaving to come home today. drives fine. stop off at the store, fire her up and start going and immediate hesitation all over the place. get it to highway speed, lots of power loss, hesitation, felt like misfires.

get it to the gfs, turn it off, let it sit, fire it back it, hesitation isnt as bad (just got home), but its still there.

give me a list of things that i should think of / check...

obvious first spot would be plugs...but having one working hand makes that hard to do.

bad gas maybe? i'm down to a 1/4 tank left so dunno why that would start up now.

checked everything under the hood...nothing came loose, etc.

ill have to hook it so a scanner and see if i got any other lights...my light is always on so i wouldnt know if something turned on

gonna let it sit for a few hours then take it back out...dont fucking need to deal with this right now.

Click to read more...

 

[Bob Kazamakis]

Well that's no good. I'd say being so suddenly it would be fuel related.

 

[Mook]

i THOUGHT i caught a whiff of gas sitting at the light but i was in traffic so it was hard to say

 

[DanJ]

Maybe you ran over another rabbit or whatever blasted your test pipes.

seriously though...
Maaaaybe the O2 sensor, vacuum leak?

 

[Mook]

unless i somehow took out a primary o2

 

[IDAFC21]

dirty/bad airflow sensor perhaps? You still have the stock airbox on there right? i dont imagine it'd get too junked up, but it happens

 

[Eagle]

Endless possibilities. First I'd check fuel delivery. Then ignition. Past that, I'd hope Modern Muscle has another dyno day soon so you can con them into tossing it on the lift and fixing it for you

 

[DanJ]

was kidding about that. I meant maybe the primaries wiring harness got messed up or the sensor is going south or something.

 

[Eagle]

dirty/bad airflow sensor perhaps? You still have the stock airbox on there right? i dont imagine it'd get too junked up, but it happens

MAF... interesting. Very good initial check there too!

 

[Mook]

dirty/bad airflow sensor perhaps? You still have the stock airbox on there right? i dont imagine it'd get too junked up, but it happens

aftermarket

Endless possibilities. First I'd check fuel delivery. Then ignition. Past that, I'd hope Modern Muscle has another dyno day soon so you can con them into tossing it on the lift and fixing it for you

yaaaaa...you know how much i'm using my car lately...any downtime would leave me fucked

 

[DanJ]

Cleaning the MAF would be free and a good start.

 

[EmersonHart13]

Have any enemies? Sools been near your car lately?

 

[Mook]

was kidding about that. I meant maybe the primaries wiring harness got messed up or the sensor is going south or something.

ya, i thought of that immediately.

 

[DanJ]

all of a sudden hesitation makes that sound kind of odd though.

 

[Eagle]

Top the tank with good gas. Clean the MAF. Check the plugs. Check fuel pressure. Check your intake, I know you made a comment about a weird sound under the hood the other day. If its post-MAF, that'll hose ya for sure. It'll just start DUMPING gas in cuz it sees lean @ the O2.

 

[EmersonHart13]

Check your plug wire connections, fill up with some new fuel... Easy stuff first.

 

[Mook]

ya, ill toss gas in it before i go out again....maybe ill be lucky and it was just a fluke

 

[EmersonHart13]

I hate to say it but I have had times where the car just runs weird and the next time it is gone... Electronics can be strange!

 

[Mr Baytchos]

Your over due for a new ride by now aren't ya

 

[Mook]

why does everyone say that

 

[skeezer]

make sure you taste the gas first to make sure it's 'good gas'

 

[Bob Kazamakis]

A post maf vacuum leak would cause a bad hesitation. Does it idle ok?

 

[Bob Kazamakis]

Could have a sticky injector too.

 

[Mook]

yep. no raised idle. no overly noticeable gurgling noises from the exhaust

 

[Eagle]

gurgle gurgle