Limp mode h22

jonja · Post by **jonja** » Tue Oct 07, 2014 11:00 pm

Hi guys, ive got a big problem. My car went into limp mode. I just parked it and went to start it after about hour and limp mode was on. It has happened before but it went off after 20-30 min but this time its not coming off.
Ive checked
Several dizzys
Several map sensors(when unpluged car dies)
Injectors
Spark plugs,leads and spark by itself
Ecu
All temp sensors replaced
Petrol pump and pressure regulator
2x TPS sensors(when plugged or unplugged it makes no change)

When i do paperclip diagnostic it doesnt shows anything.

Any ideas guys? Cant rev over 4k rpms and it drinks 3x more petrol than usual, running really rich

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Tue Oct 07, 2014 11:09 pm

Is that the same whether the engine is hot or cold, or only when it's hot?

it shouldn't be possible for the ecu to go into limp mode and put on the fault light, buy not store any fault codes I think, which could only mean one of 2 things?
1. When you do the paperclip test, are the abs and 4ws lights going into fault read mode ok or are they showing nothing either? If so, that suggests the service connector hasn't bridged properly (non conductive paperclip or not making good contact)
2. Ecu is buggeered. Do you have a spare you could swap it with?

jonja · Post by **jonja** » Tue Oct 07, 2014 11:21 pm

Temperature doesnt affect it. It stays same all time

Yea when i plug it in my abs light goes off(got no faults) but check engine stays constantly on

I dont got any other ecu

'92 Si VTEC · Post by **jjmartin349571** » Tue Oct 07, 2014 11:39 pm

Have you checked your oil level?

jonja · Post by **jonja** » Tue Oct 07, 2014 11:53 pm

Yes its good, but why it would go to limp mode because of oil?

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Wed Oct 08, 2014 8:39 am

Try another engine management ecu then.

Post by **vanzep** » Wed Oct 08, 2014 9:16 am

Does sound like ECU but I would check the distributor timing as well.
When was the cambelt changed and did you replace the autotensione?

Post by **Merlin** » Wed Oct 08, 2014 9:20 am

If it is going into limp mode there must be a fault code. Does the CEL light come on to show the car has gone into limp mode?

Post by **Donald** » Wed Oct 08, 2014 9:24 am

I accidentally pos repped wurly. Can someone undo it?

Never mind I think I negged him the other day

Jamie P 2013 · Post by **Jamie P 2013** » Wed Oct 08, 2014 9:30 am

I had a similar issue on my lude It randomly went into limp mode. It turns out one of the connections to the ecu had some corrosion on it. I cleaned it up and not had a issue since.

Lude Generation

Limp mode h22

Limp mode h22

Re: Limp mode h22

Re: Limp mode h22