Missfire and hesitation mk2 sw20 2.0 gt n/a

[Atmu999]

Hi all... I have a mr2 mk2 2.0 gt sw20 n/a... Slight missfire on idle and hesitation when setting off... Replaced plugs, leads, dizzy and rotor, coil lol fault still there... The car had been sat for years in my garage... Anyone have any ideas please, much appreciated

[fred130111]

Have you used the built in diagnostics port to check for fault codes?

[Atmu999]

Am gonna try get one soon... I don't have the connection yet... Will post results when done. Thanks for reply 👍

[mr2magic]

? What connection?

you just need to short Pins Te1 and E1 and then switch on the ignition. The CEL will then blick any codes stored.

Have you changed the fuel filter? Check the injectors aren't clogged.

[Atmu999]

I was gonna get a scanner from a friend to check codes... I'll do that way and see what I get... New filters been done, I got a injector max machine at work which should hopefully clean injectors so I'll try that aswell 👍 thanks all

[ashley]

You don't use a fault code scanner on these cars- as said above: bridge the two connectors and read the fault code from the check engine light

[Atmu999]

My bad lol... 4-1 so indicates throttle sensor... I'll clean it up and check earth. Anyone had this problem.. Years ago it was running fine the old girl lol. Might even treat her to a new one

[Atmu999]

I've removed the sensor to check for dirt etc... Looks fine, then did a resistance check between pin vta and e2 it was 3.4 but as I twisted the throttle round the resistance moved up then 1/3 of a turn and went to open circuit... Am guessing it's the problem?

www.mr2oc.co.uk/know-your-2-knowledge-b ... kbartid=59

That's how I was checking

Thanks guys

[wenguin]

May not help you directly, but if you're going to clean up the throttle body I found this chap's guide on AE86 TB refurb to be interesting - I think some of the logic to it applies to 3sge TB/sensor cleaning and ISCV config:

https://www.youtube.com/watch?v=_JD9BtoScL8