Hard to start after running hard - Page 2

**GreyGTV6** · #16 (**permalink**) 04-14-2008, 12:01 PM

I dicked about with mine for 6 months and had a thread going. Did Greg's tune-up more times than I can remember and replaced almost all the hoses. I had spark and fuel but the thing laughed at all my attempts. After 20-30 minutes cranking it may fire if it felt like it. Had it towed to the agents and within 10 minutes and a new coil all was well. Go buy a blue Bosch as everything else seems ok. Mine cost $20 for a used coil plus one hour labour. If the coil does not fix it, at least you will have a better than stock coil in your car.

ALFA NOLA · #17 (**permalink**) 04-14-2008, 09:19 PM

Thanks mjr, I will do just that.

I noticed something today as I was checking the connections at the fuel pump under the car. The fuel line is pretty crimped/ severely bent at the front. I'm thinking that it may not be letting enough fuel through. Thoughts?

mjr · #18 (**permalink**) 04-15-2008, 12:27 AM

grey gtv6 makes a good point. for the sake of what a new coil will cost you, replace that first before anything else, since it's just about the easiest and quickest thing to replace. you mentioned you were getting a weird issues with your rotor cap. If you have an intermittently breaking down coil, or low current output from the coil, it could cause this. Once done, move on to affore mentioned checks if that doesn't work. The u turn at the front of the fuel pump is a very tight turn anyway, pretty piss poor design, for the sake of having the pump mounted the other way around to eliminate the U turn.

ALFA NOLA · #19 (**permalink**) 04-15-2008, 12:58 PM

Seems like everybody's out of the Bosch coil... any sources other than IAP?

ALFA NOLA · #20 (**permalink**) 04-15-2008, 04:30 PM

Well, I pulled the cold start valve out and turned the key and... nothing. Seems like there is no fuel reaching the engine. Checked the fuel pump connections, tried again... same thing. Can't hear or feel fuel pump coming on.

**GreyGTV6** · #21 (**permalink**) 04-15-2008, 04:46 PM

Pull the top of the AFM off and with the ignition turned on, open the flap. You could also pull the air filter off and stick a screwdriver into the AFM to open the flap. Either way you do it, with the flap open and the ignition on, the relays at the right back of the engine compartment should pick, start the pump and you will hear the fuel flowing in the fuel rail. If it does not flow, give the relays a smack with a screwdriver and this could cure it. Mine does it all the time, even after cleaning the contacts.

Matthew K · #22 (**permalink**) 04-15-2008, 04:56 PM

Have you checked the double relay? That controls the fuel pump.

ALFA NOLA · #23 (**permalink**) 04-15-2008, 05:49 PM

It's ALIVE again! But I can't explain exactly why!
I pulled the combination relay, cleaned off the connectors and put it back on. then cleaned the group of ground wires at the back of the engine by #3 plug. Moved them around a bit... and she started! I let run about 5 min... then shut her off... cranked right back up. So.... me thinks its definitely a CONNECTION problem... something is loose and it just takes a bit of play to make bad.
Thanks for all your helpful suggestions. It's good to have family!
Keeping fingers crossed!

ALFA NOLA · #24 (**permalink**) 04-16-2008, 06:22 PM

I think I found the culprit... this Hall effect sensor may be bad or loose... make sense guys?

ALFA NOLA · #25 (**permalink**) 04-16-2008, 06:35 PM

Or it could be this combi relay that I cleaned

or the grounds that I tightened

Anyone know what THIS wire might be? I discovered it loose under the steering wheel?

5yearplan · #26 (**permalink**) 04-17-2008, 03:12 PM

Your guess is as good as mine, as every now and then my car just would not start, but if I unplugged and replugged that double relay in, she fired right up. Italian voodoo methinks.

ToonRboy · #27 (**permalink**) 04-21-2008, 04:41 PM

Quote:

Well, I pulled the cold start valve out and turned the key and... nothing. Seems like there is no fuel reaching the engine. Checked the fuel pump connections, tried again... same thing. Can't hear or feel fuel pump coming on.

ALFA NOLA · #28 (**permalink**) 04-21-2008, 09:54 PM

Actually the coil is a Bosch BLACK coil... I thought that it was just an old faded blue one... but I rubbed it and it's black. Do they turn?

I'm pretty sure I've narrowed it down to the pulse generator/Hall effect switch... mine looks like the wires have been twisted and there is a small loose connection. Funny... all of a sudden my door jamb switch seems to have crapped out on me.

GTV-6 = ELECTRICAL NIGHTMARES... but I LOVE her... I guess I like abuse. Just like a fine woman that I know... makes me want to run into a brick wall sometimes... but I forget all that when she's purring!

**GreyGTV6** · #29 (**permalink**) 04-22-2008, 11:31 AM

If you had fuel starvation, then it can't be the hall effect sensor. The combo relays are the most likely culprit. With ignition on, butterfly open and key turned the pump should run when the relays pick. I don't think the sensor comes into the circuit at this point. It's something separate and on the ignition circuit. The 2 don't really interfere with each other. Unless someone knows something I don't.

My relays are acting up and I need to open them and clean the contacts themselves. I've become used to giving them a whack with back end of a screwdriver.

**GreyGTV6** · #30 (**permalink**) 04-22-2008, 11:44 AM

Quote:

Originally Posted by ToonRboy

NOLA, this isn't really a good way to check for fuel on the rail. The Cold Start Valve isn't always energized - unless the engine is cold. Looking at the fact that you have a Bosch blue coil (not factory) and the fact that you replaced all the hoses, I would suspect that you upset something. As soon as I turn my ignition to on, I hear my fuel pump. So the starter relay, coil connections, plenum grounds, and the hall sensor connection are where I'd focus.