D1 3.5 V8 not starting
Moderator: phpBB2 - Administrators
D1 3.5 V8 not starting
Hi All
New to the forum.
I disconnected my battery on my 1991 D1 3.5 efi to charge it and when I reconnected the battery she won't start.
Cranks over and I have good spark at the plugs but will not fire.
How do I check for fuel, I don't know anything about the efi system?
It doesn't have an alarm so I don't think it's an immobilizer issue.
Cheers Simon
New to the forum.
I disconnected my battery on my 1991 D1 3.5 efi to charge it and when I reconnected the battery she won't start.
Cranks over and I have good spark at the plugs but will not fire.
How do I check for fuel, I don't know anything about the efi system?
It doesn't have an alarm so I don't think it's an immobilizer issue.
Cheers Simon
Re: D1 3.5 V8 not starting
Any idea which of the EFi systems is on there?, flapper or hotwire?
Chris.
Chris.
--
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Re: D1 3.5 V8 not starting
Assuming Hotwire (as it’s the only one I know anything about) does the fuel pump run for few seconds on power up, you can normally hear it.
If so can you tell if it re-starts when the engine is turned over? As soon as you get a spark the pump should re-start, if not then the EFi is not getting that signal, the ignition is THE signal to make the system perform fuelling without it there’s no chance.
If so can you tell if it re-starts when the engine is turned over? As soon as you get a spark the pump should re-start, if not then the EFi is not getting that signal, the ignition is THE signal to make the system perform fuelling without it there’s no chance.
Re: D1 3.5 V8 not starting
How do I tell if its flapper or hotwire??
- Ian Anderson
- Forum Contributor
- Posts: 2396
- Joined: Sun Nov 19, 2006 9:46 pm
- Location: Edinburgh
Re: D1 3.5 V8 not starting
From memory
The Hotwire system has 3 relays, one of them powers the fuel pump, I know I needed to replace that relay once.
There is also a black wire that goes to air flow meter, if you bumped that off by mistake the engine will not start.
Ian
The Hotwire system has 3 relays, one of them powers the fuel pump, I know I needed to replace that relay once.
There is also a black wire that goes to air flow meter, if you bumped that off by mistake the engine will not start.
Ian
Owner of an "On the Road" GT40 Replica by DAX powered by 3.9Hotwre Efi, worked over by DJ Motors. EFi Working but still does some kangaroo at low revs (Damn the speed limits) In to paint shop 18/03/08.
Re: D1 3.5 V8 not starting
If it is 91, it won't be flapper. But not sure when GEMs replaced hotwire.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Re: D1 3.5 V8 not starting
Good point Dave, '91 is firmly in Hotwire teritory.
Other than that, difficult to explain without pictures, plenty of photo's on the Internet though.
Re: D1 3.5 V8 not starting
Hotwire has 2 relays specific to the EFi function, main and fuel pump, there are a few more but they are related to air conditioning mainly, they won't stop fuel running. About 3 of those, can't remember for sure as I don't have ACIan Anderson wrote: ↑Sat Jul 31, 2021 7:03 amFrom memory
The Hotwire system has 3 relays, one of them powers the fuel pump, I know I needed to replace that relay once.
If the fuel pump is firing up for 2-3 seconds when ignition initially switched on then both must be good.
Cable going to flow meter has 4 (I think) wires, I suspect you possibly meant the single black/white wire going to the coil?Ian Anderson wrote: ↑Sat Jul 31, 2021 7:03 amThere is also a black wire that goes to air flow meter, if you bumped that off by mistake the engine will not start.
Ian
Re: D1 3.5 V8 not starting
Yes. If it's like the flapper in that respect, a white/black wire goes from the coil negative via a plug-in inline resistor to the ECU. If that connection is bad it won't inject.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y