Having an issue with my 91 Diablo and was wondering if anyone else can relate to this or suggest a fix.
My warning lights are on, checked the code, flashes twice indicating the Lambda sensor detected weak fuel mixture.
My major problem is that in the range of approx 2500-2900 rpm I experiencing a little bogging does anyone else have the same problem?
If i just sweep past that range the car seems to run fine, but that range is 30 miles an hour, kind of hard to avoid that rpm.
I experience it in 1st and 2nd a little in 3rd but not 4th or 5th at the rpm range
I have Borla exhaust and no cats.
Have changed the o2 sensor, cap, rotor, plugs and the TPS. Put in K&N filters.
My next step is to put o2 sensor spacers in to lift the o2s out of the stream a bit to try and get rid of the warning lights.

Any suggestions or comments would be great
Thanks
Phil

Come on, someone here has to be able to help the guy!

I am sure someone will reply soon enough, I just post a couple of hours ago

I should get new glasses

Check the exhaust. Is one side stronger than the other? Is one getting hotter?

It could be condensers and/or computers. Did you check spark plugs? Are both check engine light on?

Yes one side of the exhaust is is slightly stronger than the other and hotter.
I have changed the spark plugs and both lights are on.

Which side? My first reaction was clogged fuel injector?

I thought of putting fuel pressure gauges and was wondering if anyone had done something like that before.
I also did some other tests, one was to use a stethoscope to listen to the injectors, the all were ticking quite loud.
The other test involved taking the temperature reading on the exhaust manifold and the exhaust discharge The temp on the exhaust
manifold was pretty constant expect for the closes pipe to the driver seat ( i don't know the # at this moment) was very cool compared to the others and the pipe closest to the rear of the
car on the drivers side was the hottest.
The exhaust temp was also different from side to side. the drivers side being cooler.

Another thing i forgot to mention was that when accelerating very hard and then slightly backing off on the gas i feel a surge of power and it wants to go faster.
As if were better not to accelerate so hard to receive more power.

Cheers
Phil

Sounds like the computer. I have a 91 and had the same problem. Switch them and see if the stronger exhaust moves to the other side. If so, bad computer.