| Author |
Message |
Richelson (Richelson)
Member
Username: Richelson
Post Number: 830
Registered: 12-2001
| | Posted on Wednesday, October 16, 2002 - 9:57 am: | |
I have started a few with the cold start system disconnected and they started up just fine. They didn't fire instantly but once lit it was fine. |
Timothy Fulmer (Tf308)
New member
Username: Tf308
Post Number: 6
Registered: 5-2002
| | Posted on Tuesday, October 15, 2002 - 6:15 pm: | |
I once accidently disconnected the cold start injector. When I started the car it would stumble alittle before it set into idle....so yes when it gets colder you will notice a difference at start up.
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Mitchel DeFrancis (4re308)
Member
Username: 4re308
Post Number: 698
Registered: 6-2001
| | Posted on Tuesday, October 15, 2002 - 2:49 pm: | |
Report: I have been driving the car around with the cold start injector disconnected and it runs and drives just fine. Will I begin having difficulty with cranking her up when it gets a little colder if I leave it disconnected? |
Greg Rodgers (Joechristmas)
Member
Username: Joechristmas
Post Number: 491
Registered: 3-2001
| | Posted on Friday, October 11, 2002 - 4:17 pm: | |
If the thermo time switch is sticking it could cause the cold start injector to spray for a longer period than it should. The volume leaving the injector wouldn't change but the time period that it is spraying can change. It should only spray for around 8 secs. max and that is in cold weather. The thermo time switch reads the temp and tells the cold start injector when to fire. It also could be that the cold start injector is leaking and continues to send gas into the engine causing it to flood. |
Mitchel DeFrancis (4re308)
Member
Username: 4re308
Post Number: 696
Registered: 6-2001
| | Posted on Friday, October 11, 2002 - 2:30 pm: | |
Hey Greg it was great seeing you too man. Your 308 QV is a rare and beautiful one, and I love it! OK back to the car, I had previously disconnected the cold start injector, and it started just fine. I just got back from driving it for an hour, it ran flawlessly. Not one hiccup, sput or sputter. Can this behaviour be a faulty cold start valve? If so, what is it doing to prevent the car from starting now? I think it is dumping too much fuel when I go to cold crank it. |
Greg Rodgers (Joechristmas)
Member
Username: Joechristmas
Post Number: 490
Registered: 3-2001
| | Posted on Friday, October 11, 2002 - 11:52 am: | |
Sounds like you are losing pressure. If it was the pump itself it wouldn't make the trip down the road. If you get a chance look underneath the car on the drivers side and pull the accumulator's vent line. See if gas comes out of it or not. It is the small line with I believe a phillips head screw holding it on the back of the accum. I would check here first to see if the diaphram is leaking. If you want to see if the cold start injector is leaking down, take it off of the plenum and set it in a pan and watch it. When I lost pressure only on hot starts I would remove the airbox top and turn the key on and prime the system by gently pushing down the airflow sensor plate. This is can quickly tell you if you are losing pressure of it the injectors are flooding the engine. It was good to see you at Italian Car Day. |
Lawrence Coppari (Lawrence)
Member
Username: Lawrence
Post Number: 296
Registered: 4-2002
| | Posted on Friday, October 11, 2002 - 11:03 am: | |
Can you bypass the fuel pump relay with a pronged wire? There probably is a schematic on the relay that shows where to attach the wire. If it is a typical Bosch relay, you go from terminal 30 to 87. When in off position, 30 goes to 87a. Or just switch some relays around... |
Mitchel DeFrancis (4re308)
Member
Username: 4re308
Post Number: 694
Registered: 6-2001
| | Posted on Friday, October 11, 2002 - 10:29 am: | |
Well, I went this AM to start the car and she did not start. I ran the battery almost to death again, got pissed off and walked away for a minute. Went back, disconnected the cold start thingie and pumped the pedal while cranking, and she sputtered to life. I let her run for a while, then shut it off and took a phone call. After the call, I went back to the car and it did not start, it just cranked and cranked. Pumped the pedal several times, and she fired up. I took her for a drive, all seemed fine. Came back home and turned it off, and it fired right back up immediately. I'm clueless. I would think if the fuel pump was bad, it would not run long.
I'm going to check the fuses and relays again.... |
Vince Canipelli (F308vc)
New member
Username: F308vc
Post Number: 47
Registered: 2-2002
| | Posted on Friday, October 11, 2002 - 12:40 am: | |
Mitch... When the fuel pump went out on my 911, it did the same thing!!! |
Mitchel DeFrancis (4re308)
Member
Username: 4re308
Post Number: 691
Registered: 6-2001
| | Posted on Thursday, October 10, 2002 - 6:24 pm: | |
Hi everyone, here is the latest report. I disconnected the cold start valve (blue thing on the right hand side of the intake). Evan Ross mentioned that it could be dumping too much fuel in at start up and that I probably overloaded the engine with fuel and flooded it. Well it turns out that some water had gotten into the valve. All seems fine now, I drove that car and it seems ok. I was tracking the relays and fuses, but all looked ok. So I guess the car was in a bad mood or something. Thank you guys for the input. I will keep you posted....
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Steve Magnusson (91tr)
Intermediate Member
Username: 91tr
Post Number: 1116
Registered: 1-2001
| | Posted on Thursday, October 10, 2002 - 11:35 am: | |
Mitchel -- If it fires strongly and every time when cranking the starter, but shuts off immediately when you stop cranking, I'd suspect something in the tachometric relay system (which provides power to activate the relay which runs the fuel pump). If you measure the voltage at the fuel pump and it's +12V when cranking, but drops to 0V when not cranking you know there's something is hosed in tachometric stuff (power, tach sensor, the tachometric relay itself, etc.). Alternatively, if you can "close" the fuel pump relay manually (usually by removing the fuel pump relay and jumpering the input to output) and the fuel pump runs you can try starting the engine to see if it runs. Just a thought... YMMV |
Mark (Markg)
Member
Username: Markg
Post Number: 281
Registered: 2-2001
| | Posted on Thursday, October 10, 2002 - 9:19 am: | |
Had same problem with my '82 GTSi; never did solve the cause, it just returned to normal after 2 weeks of sitting (happened after replacing Cats with pipes and doing some engine cleaning while I was at it - degreaser and water).
Last week I jacked car up again to clean all electrical connections and ground cable. Did more engine cleaning; car started up and ran just fine. Parked for a while and upopn restart lost some of my cylinders, backfire etc. After about 4 blocks it cleared up and ran fine again.
May be moisture related in my case, but fuse check (BOTH 1 and 3!) would be my first check in your situation, as I did loose power (died) due to fuel starvation as result of cracked fuse. |
david handa (Davehanda)
Member
Username: Davehanda
Post Number: 254
Registered: 5-2001
| | Posted on Wednesday, October 09, 2002 - 10:23 pm: | |
Check the fuel pump relay and fuse.. |
Robert Moore (Nail_it)
New member
Username: Nail_it
Post Number: 16
Registered: 6-2002
| | Posted on Wednesday, October 09, 2002 - 1:48 pm: | |
Could be anything from water in the spark plug wells to fuel-pressure, but I would check for water first.
Bob |
Mitchel DeFrancis (4re308)
Member
Username: 4re308
Post Number: 689
Registered: 6-2001
| | Posted on Wednesday, October 09, 2002 - 1:19 pm: | |
This started this past Saturday at Italian Car Day. It had rained very briefly, then later the show ended. I went to start the car and it turned over fine, but seemed starved of gas. I did get it started and all was fine. Once I got the car home, I was really low on gas. Today I go to take the car to fill it up, and it will not start at all. Almost like she is out of gas. I went to Amoco, got 5 gallons and put it in. Now it will crank and fire immediately, but then die a second afterward. So I can crank and fire, then it dies immediately. I did it 5 times until the battery started going weak from cranking previously. I just put new distributor caps, ignition wires and fresh extenders on 2 weeks ago, and it ran perfectly.
SO, who thinks its a fuel pump related problem? Or some sort of fuel delivery issue? Clogged fuel filter? Bad relay? HELP!!
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