Hi, replaced my injectors for 555 ones. Put it all back together and now I have fuel pressure but it will not start, if I put a plug in a coil there is no spark.

 

Have checked all connections and I think they are all OK, however there were two that would swap over near the back of the plenum, did my best to get them right, but tried them both ways, no difference.

 

When I crank it, it does not start, and then when I let go of the key the electric fan runs for a few seconds.

 

I will look up how to do a diagnostic for tommorrow, but I am feeling stumped. Did a search and didnt find how to do a diagnostic on the ECU.

 

I can check the various plugs for power, if someone can tell me where to find the values please? Prior to the plenum removal all was fine.

 

HELP.........anyone got a good ideas?

More than likely dislodged either CAS or Ptu connectors-don't go by the fact that they are connected,give em' a good wiggle!

Also did you refit the earths on the rear of the Plenum?

Yes to the earths, PTU, I have not looked there but will now, wheres the CAS? Is that the thing on the Right hand cam cover? yes I see it is, will look in the Am.

 

And thanks for the reply.

As the electric sub fan is starting to run when you try to start the car, it suggests something other than faulty connectors as the problem mate.

Assume you have also just fitted a 555cc chip in the ECU or fitted a replacement ECU with a 555cc chip already fitted in it ??

A problem with this area or the temp sender sensor on the top of the water inlet pipe would cause the electric fan to come on whilst trying to start the car, the latter also dumps so much fuel in the system it floods the car!

Let us know about the chip/ECU and take it from there.

smithy

Hi, have not yet tried the CAS and PTU as I have only just got up.

 

I bought an ECU off someone on here, cant remember his name but he was breaking his whole car, it was sold as having a JD chip, I bought the injectors and the ECU together. It does have a JD sticker on it but I have not opened it to look. The seller said all was ok with them.

 

I fitted the "new" ECU before I tried starting it at all. No luck, tried the old one, again nothing. Checked the ECU connection, looked at the pins, in case one had bent or something. All looks OK.

 

I will try the PSU and Cas shortly and report back.

 

Thanks people.

No luck with the CAS and PSU connections.

 

ECU I have opened the ecu and taken the numbers off the chip, not sure if there was any point. Anyway, the original ECU has a 22 on it, the new one 37. The other numbers are also different. The chip is socketed (not that I distrust the seller) just checked to make sure.

 

So, is the new ECU compatible with my car? number are as follows.

 

New ECU AT27C256R OLD A18-000-MC82231

 

MY CAR, 1992 SHORTY TT MAN. New ecu from a jap import TT (as I remember) Have not done diag yet as I wonder if the new ecu is ok to use.

One thing I did, maybe a big mistake but it was simply imposible to get the injector connectors off, so I cut the wires and re soldered them with some extensions to make them easier to fit. Once the plenum was off I could get to them.

 

Was this stupid? and if so, why, and where to go next?

 

Have done a big search for ECU part numbers and got nowhere. :headvswal

 

Is JD still around?

yeah jd is still about, are you sure you got a 555 chip

Mark, if the electric sub fan is coming on soon as she tries to start, the engine is in a safety mode and thats prpbably the reason why she won't start.

So your 100% sure that if you plug in your OLD ECU (for stock injectors) the electric sub fan comes on soon as you try to start the car ????

If it does come on, the fault lies within the sensors in the engine, if it doesn't come on, the fault lies with either the ECU itself or the Chip inside it.

Oh bear in mind when you try the car on the old ECU but using 555's it will be rich as fook and maybe hard to start and if it does, will run rough, but it's the electric sub fan noise your listening out for.

BTW any dash board lights staying on ?

smithy

Thanks Smithy, OK, the fan runs, only for a short while and it does so only when I stop cranking. So, start cranking, engine turns over, does not start, stop cranking, fan runs, then stops.

 

Does this with both ECU's. Whats my next step please?

And yes, I have PM'd the seller he assures me it was for 555 injectors, I also spoke (PM'd) John Dixon about the chip and he knew who I was talking about, so yes.

 

But, I would expect it to start anyway, even if it ran badly.

Update, I have cleaned and checked all connections, I have now got a spark. BNot the biggest I have seen (is this a sign the PTU is tired?)

 

If I put fuel past the throttle bodies it will sort of run on 2-3 cylinders, so, I seem to have no fuel going thru the injectors. Pump runs as it should, fuel pressure out of filter, so I assume pressure up to injectors. No leaks.

 

Can I check the values of the signal going to the injectors with a multimeter adn what are the values? Anyone know?

 

And does anyone have a good way of cleaning inside the connectors?

Do injectors get stuck and not work when not used?

If you have had the ECU out have you made sure the long blue connector is seated properly as it can be difficult and could cause the problems you described.

have you got fuel coming out the fuel pressure regulater to the injectors? It sounds to me like the valve in there is stuck and its sending fuel straight back to the tank.

did you have the fuel lines off at all?? is there any chance you got inlet and return the wrong way round ?

If you have had the ECU out have you made sure the long blue connector is seated properly as it can be difficult and could cause the problems you described.

 

I think so, I have checked it a few times, as you do. I will look again, thanks.

did you have the fuel lines off at all?? is there any chance you got inlet and return the wrong way round ?

 

Now theres a question. I have thought about this, I need to look at a picture to make sure I have it right.

 

 

Funny how you can think of something and then forget all about it later. When you need it.

 

 

EDITED. Fry you are a star, just had a look and swapped them round, car started first go, only on three cylinders but I can cope with that after all the messing about its had.

 

So, one I feel a fool, two I am relieved it was nothing serious. mind you what a game.

 

 

Thanks everyone..... :)

have you got fuel coming out the fuel pressure regulater to the injectors? It sounds to me like the valve in there is stuck and its sending fuel straight back to the tank.

 

Dont know, I will check, thanks.

I think so, I have checked it a few times, as you do. I will look again, thanks.

also dont over tighten it i had running issues when i over tightened the ecu connector!!!

Again, thanks to everyone. And I will watch how tight I do the bolt. :-)

Glad your sorted, its an easy mistake to make but I bet you never do it again :wack:

Glad your sorted, its an easy mistake to make but I bet you never do it again :wack:

 

 

not in this lifetime......