My girlfriends car is starting to mess up and we dont know what is wrong, we just changed the dizzy and the battery (with in the last week). Her car is a 91 civic DX hatch (still dpfi). her car is very hard to start when it gets hot (and from what I know her bro switched out the main relay already). and it feels like it hard to start when its not hot either (worse when its hot). It cranks for a long time, then when it catches it sorta like a put put start (like a lawn mower) it feels weak and takes a while before it fully starts.

what do you think is the problem? I think it might be the spart plugs and maybe spark plug wires. any other suggestions

 

man check your coolant temp sensor thats what it sounds like to me....

 

not being rude or anything but how does that have to do with it starting, im sorta ignorant about that

 

Have you checked the compression?

 

I'll check it this weekend

 

not meaning to be a dick or anything but it sorta has everything to do with starting lol its prolly fried

 

well I know it has to do with starting but what about the starting? its not the starter cause the car cranks, but it takes a while before it catches, and when it does catch it feels weak when it does like its about to die or not start up at all

 

could be the wires and plugs...also a fuel filter...can u hear the relay go on? my best bet it ur relay..put the key in to the on position but dont start it...u can hear the pump pumpin

 

talked to her bro the spark plugs and wires have been changed, main relay changed. and fuel filter ill ask

 

just try and listen to the pump and c if it kickin in..it takes like two minutes...this way we can make sure the prob is not the relay...cause u can buy a faulty part.....its happen b4.just try this. check the timing aswell... is the dizzy in at the right spot....centered

 

It's the relay. Any time that you have a hard start in the hot weather, you're looking at the relay. There are micro-cracks that form in the circuitry, and with the heat, they expand and cause more problems. Even if it has been replaced, there is no certainty that it was a good one.

Swap out the main relay with a known good unit, and then give it a shot.