Vtec solenoid, still got my cel 21

rick82 · Post by **rick82** » Thu Jul 30, 2015 11:54 am

Thanks for your replies I think I'm going have to go the ecu route just to rule that out

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Thu Jul 30, 2015 7:06 pm

rick82 wrote: yesterday i started it and let it ran for a while and after about 15mins the light came on.

Just idling for all that time?

If so, it shouldn't even be looking at anything vtec related. Did the revs change around the same time as the light coming on? What temp was the coolant gauge at then?
(I'm thinking that sounds around the time the lambda sensor should be taking over from the coolant temp sensor controlling the mixture...)

Most of the time the light was coming on when at slow speeds in stop start traffic but on the motorway at a constant speed it doesn't?

That sounds heat-soak related?

rick82 · Post by **rick82** » Thu Jul 30, 2015 7:48 pm

Yes it was just at idle no revs at all. The coolant temp was normal at halfway. Funny you should mention the heat though because I thought it could be something heat related but could never think why that would show a code 21?
Last winter I did notice a few times in the morning as the the coolant got up to temperature it would sometimes go down a bar I just put this down to a sticking thermostat. Do you think it could be related?

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Thu Jul 30, 2015 9:12 pm

The car is in Bow you say...

rick82 · Post by **rick82** » Thu Jul 30, 2015 9:19 pm

Yes it is tomorrow, I will be taking it for its mot in strood on Saturday

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Thu Jul 30, 2015 9:31 pm

Ah. That won't work then

I am working between Ilford and Stratford a lot at the moment, so I could have perhaps popped in for a look next week, but strood is a definite no-no

rick82 · Post by **rick82** » Thu Jul 30, 2015 9:38 pm

Well all being good with the mot on sat it will be in bow all next week apart from Thursday. I have been reading up on heat soak it's just strange that it started all of a sudden, no changes to anything just one day it came on. I will check all the wiring Nd pipes around the intake tomorrow but again not sure why that would be throwing a vtec solenoid cel but i will try anything to stop that light coming on.