Car hesitating

tomo92 · 01-02-2016 12:01am #1

Il try explain this best way I can as I'm not a mechanic, I bought a 04 1.8 opel vectra, petrol, it needed a couple of bits so I put in the following 2 new front tyres, outter tie rods, serviced oil and filter and also new thermostat (genuine part) and last week the engine management code came up p0170 and comes up after a couple of days of wiping it, when I start the car from cold sometimes it feels like it is going to cut out, and when I set of she starts to stutter and chuggs for maybe 30-45 secs, then seems to run fine also I noticed when on the motorway it hesitates if I have the accelerator pressed a little but if I floor it she's fine, I've cleaned the MAF sensor and no joy, just looking for abit of advice, as it is driving me f*** ing insane now at this stage.

Zaph · 01-02-2016 12:31am

Moved from Feedback

chicorytip · 01-02-2016 2:29am

The problem could be due to a build up of carbon in the throttle housing.

Steve · 01-02-2016 2:36am

Are the HT leads ok?

Had a similar problem years ago and it was down to cracks in the insulation and damp getting in.

visual · 01-02-2016 3:23pm

this might give some insight

https://www.vectra-c.com/forum/showthread.php?181234-p0170-11-code

tomo92 · 02-02-2016 1:23pm

I was thinking of cleaning the throttle body as its a quick and cheap way to make sure it's not that, the ignition leads seem fine no visible cracks and plugs seem grand too, I cleaned the maf sensor with a bit of spray and let it dry and still the same then I disconnected it (not for too long) and still the same, I have a previous nct report and it failed on lambda sensor last time 0.92 and then passed again in August at 1.03 so I am guessing not 100% that 1 was changed and it might be the other 1 is faulty could that be a possibility? Or am I just hoping for a simple fix

tomo92 · 03-02-2016 8:41pm

UPDATE: had the car up with the mechanic today and he done a smoke test and bang there it is lambda sensor not holding its volts, when I got the car it had a universal lambda sensor in it, the mechanic said that he has put them in for people and a couple of days later they'd fail the nct, get a genuine one with the plug of to scrap yard for me tomorrow, just in time as well NCT on Monday, thanks for all the advice.

Steve · 04-02-2016 4:45am

So, was the lambda was causing it to run rich?

This normally means it's dirty and a good clean will sort it.

Steve · 04-02-2016 4:46am

So, was the lambda was causing it to run rich?

This normally means it's dirty and a good clean will sort it.

tomo92 · 04-02-2016 4:17pm

Yea that was the cause of it, I would clean it and put it back in only for its a universal lambda sensor and they can fail 2 after putting it in, but today I got one in the scrap today €25 so hopefully problem solved, touch wood.

Cee-Jay-Cee · 04-02-2016 4:50pm

tomo92 wrote: »

UPDATE: had the car up with the mechanic today and he done a smoke test and bang there it is lambda sensor not holding its volts, when I got the car it had a universal lambda sensor in it, the mechanic said that he has put them in for people and a couple of days later they'd fail the nct, get a genuine one with the plug of to scrap yard for me tomorrow, just in time as well NCT on Monday, thanks for all the advice.

But a new one. One from a breakers yard that's been lying idle for who knows how long is only asking for trouble.

tomo92 · 04-02-2016 9:02pm

Cee-Jay-Cee wrote: »

But a new one. One from a breakers yard that's been lying idle for who knows how long is only asking for trouble.

To be honest if I had time on my side I would, I hve a NCT Monday and I rang up this yesterday to get the genuine part but I couldn't have it until lunch time Tuesday, so I have to take my chances, and 25 isn't 2 bad, il clean her up with a bit of carb spray and hope for the best Monday.

Car hesitating

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