Any ideas please

You're going to need a capable scanner so you can start reading some codes which you have stored in memory in your car's system like the Honda insight and what have you it has lots of computers and lots of electronics and lots of software to tell you what's kind of going on You will need that data just like you would in the Honda for this car that'll be a big start to help your husband if he's not been scanning his Hondas I guess y'all just have regular gas civics with you know all the parts on them or something anyway this is a little different you'll need to get it scanned and probably stop changing fuel injectors those are things that are kind of really rare on these cars until you're up above 300,000 something like that this engine is not known for things like that so I'm pretty sure he's barking up the wrong tree The codes are really help. It's probably actually something pretty simple this engine's not known for blown head gaskets but it won't take a lot of abuse Make sure the car has water in it there's a belt around the water pump there really is one if you don't see one there's a problem etc.

 

Without actually seeing the car, the only thing I can tell you for certain is the fuel gauge will blink with one dot any time 12v power is lost and then restored. The fuel indication will 'recalibrate' itself eventually and stop blinking. Could be 5 minutes or 5 hours. Make sure all your 12v connections are good at the battery and the (-) cable fastener at the body is tight. Another indication of a bad 12v connection is that you'll lose your radio presets and the driver window auto up/down feature will stop working.
You definitely want to make sure the fuel tank is NOT actually low, because you'll make your life a lot more difficult by running it out of fuel.
If it's showing more than one dot while blinking, then you have another issue going on that it's trying to tell you about (like a blink code).

As for the "white smoke"......heavy white 'smoke' is typically indicative of coolant being drawn into the engine cylinders. Whether that be a failed head gasket or a mechanical failure of the engine itself, would need to be determined. Very light white smoke at idle is typically condensation inside the exhaust just burning off. An engine running very rich (like a failed open injector) typically emits dark gray or black exhaust.

 

How many miles on her?

 

Your car has a rubber bladder inside the fuel tank, and sometimes they’re not accurate

 

A gen 2 with a blown head gasket is rare but possible. If your husband is handy he could remove and clean the throttle body. You can keep the hoses connected and just move it to the side. Gently clean out the TB or throttle body and maybe remove the intake manifold and clean that. Id check the air filter to make sure it is clean. Did you replace the spark plugs when you did the fuel injectors? What about the PCV Valve? A new one is $8 and well worth a replacement if you don't know the last time it was changed. A tank of 91 Octane three times a year is also helpful. IMHO