Re: More Noob Questions (TwoDogs)

Mon, 02 Dec 2019 03:09:20 GMT

Might be worth putting it on a dyno and look at the fuel ratio report to see if fuel or air is the problem.

Re: More Noob Questions (Reddtarga)

Sun, 01 Dec 2019 16:13:11 GMT

That would need an awful LOT of paper.
They don't call it the BIG green book for nothing ha ha.

Re: More Noob Questions (Whore of Babylon)

Sat, 30 Nov 2019 18:43:04 GMT

JME

Thanks for the info, it's much appreciated. I'm downloading the book now :)

Do yourself a favor and go get it printed and bound, makes life SO much easier when working on your car.

Re: More Noob Questions (JME)

Fri, 29 Nov 2019 08:17:12 GMT

Reddtarga
VSV = vacuum switch valve - see pic below.
The pic is actually from the Gen 3 engine service manual but your car is much the same

BGB (big green book) 1991 SW20 service manual.
Download free at:
https://www.mr2oc.co.uk/forum/198/80372.html
Although US based, still generally applicable to the ADM cars.

Thanks for the info, it's much appreciated. I'm downloading the book now :)

Re: More Noob Questions (Reddtarga)

Wed, 27 Nov 2019 17:32:58 GMT

VSV = vacuum switch valve - see pic below.
The pic is actually from the Gen 3 engine service manual but your car is much the same

BGB (big green book) 1991 SW20 service manual.
Download free at:
https://www.mr2oc.co.uk/forum/198/80372.html
Although US based, still generally applicable to the ADM cars.

Re: More Noob Questions (JME)

Wed, 27 Nov 2019 12:13:54 GMT

Falcon
Check ALL vacuum hoses for cracks, leaks etc. Down low at back of inlet manifold there should be a couple of VSVs. Check their filters and that their vacuum hoses are correctly routed. BGB has info.

Thanks for your reply, I agree it could be standard service parts but it runs so well at low/mid rpm that I think probably not. It also runs fine up hills so I don't think it is the fuel filter. I'm pulling the engine out to do the clutch, water pump, timing belt, etc. so I'll check the vacuum hoses for cracks but I have a few questions:

What is a VSV, what do they look like?
What do you mean BGB has info?

Re: More Noob Questions (Falcon)

Wed, 27 Nov 2019 09:22:58 GMT

I assume you mean it won't rev past 5000 in say third gear at WOT?
When was fuel filter last changed? Air cleaner?
As Mike says, start by replacing all normal serviceable parts. Distributor cap and rotor, correct spark plugs etc.
Then check high tension leads and especially the master lead not only for resistance but also that their connections are clean and not corroded.
Check ALL vacuum hoses for cracks, leaks etc. Down low at back of inlet manifold there should be a couple of VSVs. Check their filters and that their vacuum hoses are correctly routed. BGB has info.
To check the actuator on inlet manifold for correct operation. 1. Engine off. 2. Observe actuator position. 3. While watching actuator, have someone start engine. 4. Actuator should immediately snap closed.
You could also disconnect and plug the actuator's hose and take it for a drive ?
A partly blocked CAT or exhaust muffler could also cause this symptom.
Incorrect cam timing is also possible but very unlikely.

Re: More Noob Questions (Carmikey)

Tue, 26 Nov 2019 10:25:44 GMT

Factory size for Toyota Sw20 Mr2 1989 – 1991
195/60-14 (Front) (14×6)
205/60-14 (Rear) (14×7)

Mostly the same, just make sure you get a hose kit to suit your revision eg. gen 1-2, not gen 3.

Regarding the straps, google for images, they both are fixed behind the firewall carpet

As for engine rev out, not sure, could be a few things, start with all replacement of serviceable parts. Sorry bit had to tell.