hot starting problem - sorted

scotland_mx3 · Post by **scotland_mx3** » June 24th, 2006, 11:01 am

hi, car is a 1992 1.6 sohc auto , uk model, the car starts and runs fine when cold, will run for a good few miles but when hot will die and refuse to start when hot , if i let it cool down for a while it will start up fine again, its been serviced recently, had new ht leads, new distributor cap and new thermostat, fuel & air filter changed. when trying to start it when hot the engine cranks over fine and it will fire for around a second and then die.

any suggestions much appreciated , its driving me mad.

cheers

ariesdude · Post by **ariesdude** » June 24th, 2006, 1:33 pm

You asked about your coolant temp sensor in your other thread - have you replaced it yet? O2 sensor is another thing that might cause problems when the engine is warmed up. Also did you check if there are any codes?

scotland_mx3 · Post by **scotland_mx3** » June 24th, 2006, 1:49 pm

my idle problem seem to stop when i fitted new distributor & ht leads so have not changed the sensor, i have no engine light on the dashboard so do i need to get it plugged into a computer at a garage to get the codes ?

ariesdude · Post by **ariesdude** » June 24th, 2006, 7:14 pm

This page -
http://eunos30x.com/info/CEL%20Codes%20 ... mplete.pdf
has instructions on how to read codes - no need for a code scanner. There still maybe codes even if the CEL is not on. Its a 14 year old car - so changing the CTS and O2 sensor could be considered part of general maintenance - and they are cheap enough and easy enough to replace anyway.

scotland_mx3 · Post by **scotland_mx3** » June 25th, 2006, 5:52 am

when i say i have no engine light on the dashboard i meant that it does not have one fitted, it would appear the early uk model does not have the light fitted, it has the diagnostic connector under the hood so it looks like a trip to my local mazda dealer to get them to pull the codes.

scotland_mx3 · Post by **scotland_mx3** » June 25th, 2006, 9:04 am

i have just noticed fuel leaking out of injector on number 2 cylinder , seems to be leaking a fair bit from the o rings , could this cause my hot starting problem ?

ariesdude · Post by **ariesdude** » June 25th, 2006, 12:32 pm

Leaking fuel is a fire hazard and needs to be fixed ASAP - i am not sure if it will cause your starting problem - but i am glad that it wont run when hot because leaking fuel + hot engine = bad.
There is a way to get codes without CEL - Just connect a test light between FEN and B+ and jumper TEN to GND and you will have your own custom CEL

scotland_mx3 · Post by **scotland_mx3** » June 25th, 2006, 12:49 pm

thanks for all your advice, am not using car untill fuel leak sorted, will be going to garage for that so will get codes pulled at same time , will use the test lamp method in the future though.

scotland_mx3 · Post by **scotland_mx3** » July 18th, 2006, 1:27 pm

problems now sorted , fuel leak with new o rings and the old favourite the coolant temp sensor ! its amazing how much of a problem that sensor can cause , thanks again for your replies. she now runs sweet and is no problem to start.

MX-3.com

hot starting problem - sorted

hot starting problem - sorted

hot starting problem - resolved