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Where to start after 4 years of neglect?

 
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BIGBOBO




Joined: 02 Dec 2007
Posts: 531
Location: Belgium
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1985 Toyota MR2 Mk1 SC

PostPosted: Wed Jul 11, 2018 5:24 pm    Post subject: Where to start after 4 years of neglect? Reply with quote Reply with quote including images

Around 5 years ago I swapped in a 4AGZE in my 86 na. I got a lot of help from someone awesome and together we got it working. Fuel usage was high at the start but a new O2 sensor fixed that. That was about the only problem we ran into.

Soon after that my personal situation changed and I had other things to take care of and the MR2 sat undriven for most of the time. Getting a motorcycle licence and moving to 1km from my work only made matters worse. I changed the oil every year and took it on one or two short drives every month.

I now have the time to drive it properly again but it developped a lot of problems and I don't know where to start to fix them all. I have fixed many issues before but never this many at once so it's hard to find the root cause of the problem. The car has:


    Lots of smoke on startup if it has been sitting for a day or two
    Smoke while warming up
    Black spark plugs full of sooth
    A blowing exhaust
    Stalls when the engine is warm
    Hard to start (5+ tries) when it rains


I thought it would be the headgasket but the oil and coolant seem to be fine. I had to add a little bit of both every now and then but nothing excessive. I orderd a cheap cylinder leakdown test but that seemed to be defective so I have to return that.

Do you guys have any advice on where to start?
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markstevieandmads




Joined: 05 Aug 2013
Posts: 1926
Location: Swindon, Wilts
Feedback Score: 5

1993 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Wed Jul 11, 2018 6:32 pm    Post subject: Reply with quote Reply with quote including images

Valve stem seals? Sticky valve/s? Coil breaking down?
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Lauren
IMOC Committee



Joined: 13 Dec 2004
Posts: 38597
Location: Greater Manchester
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PostPosted: Fri Jul 13, 2018 6:18 am    Post subject: Reply with quote Reply with quote including images

If it's hard to start dizzy cap and rotor arm.
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mr2garageswindon




Joined: 15 Oct 2014
Posts: 262

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1994 Toyota MR2 Mk2 NA Rev3

PostPosted: Fri Jul 13, 2018 1:00 pm    Post subject: Reply with quote Reply with quote including images

How old is the fuel in it?
Is the fuel enrichment staying on?
Temp sender faulty?
Fuel pressure good?
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BIGBOBO




Joined: 02 Dec 2007
Posts: 531
Location: Belgium
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1985 Toyota MR2 Mk1 SC

PostPosted: Thu Aug 09, 2018 8:54 pm    Post subject: Reply with quote Reply with quote including images

Fuel is 2 months old at maximum, filled it up end of june.

Temp gauge sits in the middle once it's warmed up.

It drives fine when warmed up so don't think the fuel pressure is bad.
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