Massive Hesitation - FIXED (The most simpliest thing)

[gurutasker]

This problem cropped up yesterday, was running sweet and then suddenly it was there, so something must've gone snap

Mainly happening when i'm giving it some decent acceleration in 2nd or 1st, anywhere between 2000-5000 RPM it suddenly loses all force, and then kicks in about 2 seconds later, with a good jolt.

Was thinking maybe the knock or 02 sensor?

Seems to be some form of sensor/ecu problem, as revving while stationary never causes.

Did a search but didn't come up with much. Any advice people can give appreciated

[Distrb]

If it was knock i would think it'd be sluggish throughout the rev range...

TPS playing up perhaps?

[Fraud]

This may sound stupid, but all your leads got good connections (plugs and coils?)

[Mr Revhead]

thats not a stupis suggestion

you didnt happen to have just washed your car have you?

have a look for a loose fitting or unpluged sensor...

[gurutasker]

This may sound stupid, but all your leads got good connections (plugs and coils?)

Not a stupid suggestion at all, it was the first thing that came to my mind. Checked as much as I could but the light was failing and I was stuffed. Saw one wire that was partially exposed, on the Air Temp sensor on my intake.

And no I haven't washed it recently at all, i usually do it reguarly but been 'out of action' as such.

[Fraud]

Cool, shouldn't really be the air temp sensor wire (I dont think, unless its managing to earth out on something).
Another idea might be what fuel you're running? At one stage I filled my charade (the almighty 3cylinder ) with dirty cheap gas, and i got a partial blockage in the fuel line, for some reason I only noticed it when the engine was under load?

[gurutasker]

I've been running it on 96 ever since I picked it up a few months ago, I'll have another good look tonight with the trusty halogen lamp Then probabley take it out for another drive and see if it's still there. Could it be the fuel pump?

[spencer]

Mainly happening when i'm giving it some decent acceleration in 2nd or 1st, anywhere between 2000-5000 RPM it suddenly loses all force, and then kicks in about 2 seconds later, with a good jolt.

Was thinking maybe the knock or 02 sensor?

under full throttle the narrow band o2 sensor doesnt have the response to be any use in correcting mixtures and isnt used. So im doubting its your problem, could be fuel, could be usefull to check fuel pressure or the filter. I had a ae92 fxgt that developed a big flatspot it turned out to be the dizzy

[Dell'Orto]

I've been running it on 96 ever since I picked it up

You havent filled up recently have you? As they've dropped it to 95, and they dont run the happiest on 96 as it is, it might be making it chuck a nana.

[B1NZ]

had the same problem with my ex AE101, ended up being a faulty HT Lead, just missed , felt like the engine died for a split second when the lead moved then took off again with a backfire, check them with a mulitmeter, also try the fuel filter?

[gurutasker]

had the same problem with my ex AE101, ended up being a faulty HT Lead, just missed , felt like the engine died for a split second when the lead moved then took off again with a backfire, check them with a mulitmeter, also try the fuel filter?

It's dieng for more than a split second, it's a pretty significant drop, but i will start checking them tonight with a multi-meter. It could be the 95 making it throw a fit, but I haven't filled up for almost two weeks since I haven't been driving much.

I'm off to have a look at it now, so finger's crossed.

[Skidman]

A lot of people have misconseptions about fuel, the fact that it has just changed by 1 octane will make no difference in your car. Plus many of the petrol companies have been sneeaky and the octane has been at 95 for over a month now.
Just check the basics, igintion, fuel etc. I suspect ignition.

[gurutasker]

Well i had a good look around and it looks liek everything is in there fine, haven't tested any HT leads or anything yet.. but I took it for another drive where I could really look at it, and i think it could be VVT related.

The hesitation is definately when I put my foot down and decides to engage, but I wouldn't think that the solenoid not working or the pulley broken would cause a complete power loss?

[Alex B]

If its a loose belt you may hear it hitting the top of the cam cover and if it skippd a tooth it would be sucky and limp all the time.

[gepsk8]

i heard of it being a gearbox stuffin out doing this!?

[Dell'Orto]

A lot of people have misconseptions about fuel, the fact that it has just changed by 1 octane will make no difference in your car. Plus many of the petrol companies have been sneeaky and the octane has been at 95 for over a month now.
Just check the basics, igintion, fuel etc. I suspect ignition.

1 octane point may not, but thats also assuming the fuel is in fact 95 octane...previous batches of 96 have been substandard at times, so a motor that was meant to run on 100 octane, and is now having to run on 95 or lower may well not take too kindly to it

[JASON_SHEMAN]

check the fuel line especially the inlet and outline of the fuel filter to see if there is any leak there....and also the "fuel regulator"

[Andy7447]

it will be the knock sensor, it happened to me

[gurutasker]

Well broke the multi-meter leads tonight, so i didn't get too far at all, thanks for the info tho, it's helped me refine my serach a bit more and come up with some commanalities.

Will post up how progress is going tomorrow night.

[Simon K]

I had something similar(and sudden)happen with the mazda a few years back. Was a pin prick sized hole in an HT lead that was earthing out on the head.