hey guys. i have a 99 civic si/ex (canadian model) 5spd that won't start. i bought it used and not running to begin with and i found that the thermostat ground was loose, tightened it up and now the car will crank over but will not start or has a hard time starting. these are the following things i have checked and replaced...

ecu
map sensor
main relay
compression checked 170psi all cylinders
ignition checked and spark is good
fuel pressure checked

what could be the problem?? i've tried holding my foot to the gas pedal and pumping it...almost wants to start but doesn't. i checked the plugs and they are wet with fuel, so probably my injectors are good. no CEL. maybe bad gas, bad fuel filter?? or bad crank sensor?

 

What color is spark at the plugs? If it's bright white, check the mechanical timing because the timing belt may have slipped.

 

they are brown, but will double check. any other suggestions guys? i'll try and swap out another distributor, i doubt that is the problem..

 

dont hold the gas pedal

 

Spark should be bright white. If not, the coil inside the distributor is likely bad.

 

update: replaced fuel pressure regulator, injectors and fuel filter no change. the only way i get the engine to turn over is if i hold the gas pedal to the floor because the engine was flooded.

 

if you have fuel -spark - and good compession it's got to be timing - you should never need to pump the gas in a fuel injected engine holding it to the floor puts it it clear flood mode and stops fireing the injectors pull the top cover off and check the t-belt also look at the rotor inside the dizzy i have seen them melt and spin on the shaft (bad dizzy bearing) and the spark plug wire;s are on right

 

update: i changed the crank sensor and checked cam timing and crank timing mark and its bang on. no change. still cranks over but doesn't start...i'll try and change the distributor tomorrow...

 

change the plugs, if thats not it check timing.... if the plugs are wet they wont work for ****.. i had the same prob on my h22 and it fired rite up ... start simple

 

update: runs of quick start fluid, while i disconnected the injectors, maybe bad gas as it floods the engine...

 

With the key in ON(II), is there battery voltage at the injector clips?

 

checked with a test light, shows continuity when cranked.

 

A node tester can be used to check whether each of the injectors pulse when the engine is cranked. If not, the problem may be the ECU or a bad ECU ground wire.

 

i've swapped different ECU no luck. i've also bolted the ecu down to the body, no change. can a bad headgasket be the culprit even though i have good compression??

 

go spend 10 bux on plugs and see what it does

 

so you checked the timing?? just swapping parts is not gonna help you learn how to diagnos a car.

 

read no0b. i've checked timing and its bang on.

i've had 3 different sets of plugs one of the set being brand new...

i think it could be a bad fuel pump not providing enough fuel pressure causing the injectors to not atomize and spray correctly.

 

i don't think fuel is the problem try changing the cap and rotor or the dizzy entirely. d-series are know for the dizzy's to go

 

i'll try a new distributor tomorrow and also a working gsr fuel pump.......hope it helps...

 

changed distributor with working coil and working fuel pump...no change...there is gas in the oil pan....