SomeSpeed
Ask Question
Toyota MR2

Advice please .. Isit maf or injectors ? Sorry for essay, new to mr2s. Any answers or advice will be greatly appreciated

Advice please .. Isit maf or injectors ? Sorry for essay, new to mr2s. Any answers or advice will be greatly appreciated ?

Rev3 turbo but has Rev 2 engine .. just done a engine change head gasket had gone on the old engine had a Rev 2 fitted hence why I sourced another one, 550cc injectors fitted

The car is over fuelling quite a lot used about quarter of a tank to do about 12-15 miles .. it’s even black smoking

Have a set of standard injectors to fit (tomorrow’s job depending on what you guys think) But the car had these 550 injectors fitted before so I just swapped over the rail and job lot thought it’ll be fine

So would I be right in thinking it doesn’t matter if bigger injectors are fitted as the same amount of fuel will be sent to them until it’s remapped for these injectors ?

So this then leads me to think isit maf sensor ?

If you put your foot flat to floor it just pops bangs nothing really happens .. To get the car to actually have some power you have to gently apply the throttle until it reaches 5k then all the power is there

Ashley

0
Reply
Related
so i cant make up my mind with injector cleaners, what one do you guys think is better?
19 answers
What other fuel injectors will fit a 1zz celica engine? I mean from what other cars?
7 answers
Hey guys I just did a Mr2 swap but my car won’t stay on !…any advices ??
13 answers
Hi all, so im running completely standard.. (Apart from a DV that a previous owner had installed
19 answers
So I just got the 2015.0 update from trifecta and #42 injectors. Is it worth doing a ported manifold?
34 answers
Hi, I’m going to replace my fuel injectors on my 1994 Miata any tips will be greatly appreciated.
25 answers
After having remap and a group a kit fitted I keep getting esp fault, have checked the alignment of maf, any ideas?
24 answers
Has anyone got hids fitted on a gen 7? Had some on an mr2 and was too dazzling just wondered if they are any good with these
7 answers
Can I spray my intercooler with stencil whilst fitted to car? Any info appreciated?
14 answers
Can you run a streetported 8 engine with the stock ecu and injectors,safely?
18 answers

11 Answers

Leon

I’m sure it would over fuel with those injectors in rev 2 use 440s, the ecu and maf modulate the Fuel air ratio ?

0
Reply
James

The car does not know what size injectors you have. It assumes 440s. You fit 540s and you’ll massively overfuel. At every load and rpm.

0
Reply
James

The rev3 fuel rail doesn’t fit a rev2 head, so what exactly have you swapped?

0
Reply
AshleyQuestion author

Yeah I have a set of 440s ready to fit tomorrow, it had already been swapped to a Rev 2 when I bought it (the engine) .. So it was just swapping Rev 2 fuel rail with 550s to the new rev2 engine

0
Reply
James

Ok makes more sense.
Yes definitely swap to 440s until you have a proper mappable ecu to run 540s.

0
Reply
AshleyQuestion author

Okies cheers dude I’ll swap them over tomorrow and take it out tomorrow see if that was the problem hope so 🙂

0
Reply
AshleyQuestion author

Changed Injectors yesterday took it a drive today .. no difference .. should the turbo actuator move (open/close) when the car is revved at a stand still ?

0
Reply
AshleyQuestion author

Guessing the injectors have sorted the black smoke issue and over fueling but .. it’s not boosting under load, the actuator rod doesn’t move atall when the car is revved

0
Reply
James

It shouldn’t move when revved. You can’t create enough load for much positive boost. Maybe 1-2psi max.
It takes the stock actuator 7psi to move/open.

0
Reply
AshleyQuestion author

Ahhh okies max boost I’ve seen on gauge is about 5.6 psi, think I’ll change the HT leads next then plugs

0
Reply
AshleyQuestion author

No photo description available.
0
Reply
Your answer Cancel

You must be logged in to post a comment.

Loading Please wait
Log in
Register
  • Contact
  • Privacy Policy
  • Terms and Conditions