car will not start after re enstalling intake manifold
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car will not start after re enstalling intake manifold
Hi i took off my intake manifold a while ago. I reninstalled it today, charged the battery and my car will not start. The fuel injectors are connected, the isv is connected, the eletrical sensors for the maf are connected. I really don't know why it will not start.
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not starting
it is an 88 porsche 928. I here the engine cranking. I am not sure how to check the fuel pressure. I don't here any combustion. I don't here it trying to start. I only here it crank.
Drifting
Joined: Nov 2006
Posts: 2,973
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From: Farmington Hills, MI
Remove one of the spark plugs and hold it against the engine while it's plugged in. Have someone crank the engine and see if there is a spark. Do not hold it near the spark plug hole in the cylinder head. Or, you could put a timing light on one of the plug wires. If you can measure the timing while cranking, then there is spark.
Racer
Joined: Feb 2006
Posts: 330
Likes: 2
From: Castro Valley, CA
I had the same problem with my 88 after reinstalling my intake. It turned out to be a shorted wire on my injector harness. Just something to check, it ended up that while only one had actually shorted 7 of the 8 needed to have the ends replaced. If the wires have shorted the car will not start.
Race Car
Joined: Jun 2002
Posts: 4,269
Likes: 25
From: Alabama
Actually be sure noone is "holding" the plug while trying to start the car otherwise they will RIP. Just let it lay against a ground and you should see the spark. Don't let it touch the ground, 2-5 mm is fine.
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Thread Starter
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car will not start
i pulled out the spark plug and tried starting it and i did not see a spark, the battery is starting to die again because I kept trying to start the car. Before It did not start I saw fuel leaking out of the rail and then i tightened it and it stopped. So I am assuming their is fuel pressure. What is I buy another battery and it does not spark? What would be the problem?
Electron Wrangler
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Joined: Mar 2002
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From: Phoenix AZ
If you must check with a plug out use a spare plug - to keep the hole filled - ground the plug with a booster cable or similar - DO NOT HOLD IT!
Alan
Burning Brakes
Joined: May 2005
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From: Chilton Wisconsin
Not sure what you mean by the wire was dry - if you mean the plug then I wonder if you had a good ground for the plug - lack of ground can lead to a no spark perception when that is not the case. A dry spark plug would indicate no fuel.
Generally I would say to bypass the three critical relays to eliminate these as potential problem areas for either spark or fuel.
Charge the battery so you get full voltage (low voltage creates problems besides lack of cranking speed).
Generally I would say to bypass the three critical relays to eliminate these as potential problem areas for either spark or fuel.
Charge the battery so you get full voltage (low voltage creates problems besides lack of cranking speed).
Race Car
Joined: Dec 2006
Posts: 4,089
Likes: 6
From: Tampa Florida
Go to the auto zone and get a spark tester about $8.00 hook yhe plug wire to it and you will see if it has spark. I agree on the inj harness issue same thing happened to me. Once the inj are removed the boot under the wireing harness can conceal shorted wires. It only takes one Inj wire to short it takes the whole thing down.