Why shoudl my '93 FZE be more gutless than the 96/97 cars ? (1 Viewer)

[jlbuk]

As above really... the 93 drives fine, but when switching between the cars, you really notice it - feels like 20% difference !

Details.
I drive like a granny, rev counter generally below 2000, occasionally 2,500 when I'm really going for it

Both cars stock, except the 93 has slightly smaller tyres (which should help it) 265/70 as opposed to 275s, both auto.

Also the '93 is dual fuel (petrol / LPG), which means there is a slight intake restriction, but that really isn't going to have any effect at the revs we're talking about here. Performance is the same on either fuel, which I guess rules out the injectors / fuel supply.

93 has had new plugs / rotor, guess I should check the leads.
93 has no brake problems / rubbing or any such.
93 has no codes, although it did once throw a 25/26 when I floored it after a misjudgment, and got up to 3,500 rpm - probably scared it !

Both cars have exactly the same fluids, both around 125k miles

Bascially, I want to make sure there are no good reasons for the performance difference before trying to find the problem... if I hadn't the opportunity to drive the cars side-by-side, I would never have imagined the '93 had any kind of problem.

I know the gearboxes are different but this doesn't seem quite right !

Thanks in advance - JB

 

[Highspeed]

My 93 was super gutless and then blew the HG. After milling the head and replacing PHH and the new HG I have about 20% more power. Might want to check your compression...

 

[jlbuk]

My 93 was super gutless and then blew the HG. After milling the head and replacing PHH and the new HG I have about 20% more power. Might want to check your compression...

Not exactly what I wanted to hear, but thanks...

 

[Highspeed]

ya, sorry man. the good news is that it might be nothing right?

 

[tblume]

ya, sorry man. the good news is that it might be nothing right?

nothing to add, hope it's nothing.
but?? why is the US spec computer an upgrade to your JDM truck?

oh, and also, highspeed is an arrogant bastard.

(no offense, good taste in beer)

 

[Highspeed]

 

[jlbuk]

hehe, all good info

Ref the computer, it's not the fact that it's from the US per se, it's just an upgrade from the older (hestation / ECM communication error ridden) factory one to the newer one that is known to solve the problems - which it did. I just thought it noteworthy that I couldn't find one (after looking for months) in the UK, so I had to get one from a boneyard in the US !!

Cheers all - JB