 Hot Start Problem |
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| Cambo |
 Jul 27 2011, 05:53 PM
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#1
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Member  Group: Members Posts: 122 Joined: 21-April 10 From: California Member No.: 11,641 Region Association: Northern California  |
75 fuel injected 1.8. It's happened twice now. Pull into the gas station, fill up, then the car won't start. It will turn over but not catch. Both times, I waited a half hour and then it fired right up. Any common things I can check?
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| Twise |
Jul 27 2011, 06:06 PM
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#2
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Member Group: Members Posts: 475 Joined: 20-September 06 From: SoCal - Temecula Member No.: 6,881 Region Association: Southern California |
Lots of debates on this one - Read the following threads. I think you will find an answer in one of them. I had the same problem and MY solution was to rip out the 1.8 Djet and replace with a 2.2 6cyl. There is most likely a more inexpensive solution below. Good luck...
http://www.914world.com/bbs2/index.php?sho...mp;hl=hot+start http://www.914world.com/bbs2/index.php?sho...mp;hl=hot+start http://www.914world.com/bbs2/index.php?sho...mp;hl=hot+start http://www.914world.com/bbs2/index.php?sho...mp;hl=hot+start |
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| benalishhero |
Jul 28 2011, 12:38 PM
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#3
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Member Group: Members Posts: 313 Joined: 28-November 07 From: Portland, Maine Member No.: 8,384 Region Association: North East States |
If it was my car I would start with the basics, namely, when it doesn't start is it not getting fuel or spark.?
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| pcar916 |
Jul 28 2011, 12:54 PM
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#4
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Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None 
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Assuming it is a starter heat issue the six cylinder engines (and starters) have the same glitch. Short of adding a relay I simply got tired of it and installed a high-torque starter... end of problem.
But truth be told the relay is a more elegant solution and saves your ignition switch's (start-position) contacts over time. |
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| MartyYeoman |
Jul 28 2011, 01:00 PM
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#5
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Senior Member Group: Members Posts: 1,526 Joined: 19-June 03 From: San Ramon, CA Member No.: 839 Region Association: Northern California
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QUOTE(pcar916 @ Jul 28 2011, 11:54 AM)  Assuming it is a starter heat issue the six cylinder engines (and starters) have the same glitch. Short of adding a relay I simply got tired of it and installed a high-torque starter... end of problem. But truth be told the relay is a more elegant solution and saves your ignition switch's (start-position) contacts over time. I don't think it's a starter issue. He states it turns over, just won't start up. I'd look into fuel line heating. Are the lines subject to excessive heat from running near the exhaust, any axillary oil lines nearby, etc? |
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| pcar916 |
Jul 28 2011, 01:06 PM
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#6
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Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None
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Oops. Obviously I just learned how to read yesterday. I stand corrected.
Good luck! |
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| Cambo |
Jul 28 2011, 04:22 PM
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#7
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Member Group: Members Posts: 122 Joined: 21-April 10 From: California Member No.: 11,641 Region Association: Northern California |
after doing a little reading, maybe the fuel pump or head temp sensor. Head temp sensor is only a few bucks. Thinking about starting there.
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| McMark |
Jul 28 2011, 04:37 PM
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#8
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Speculating here... could be that the engine is hot, so the head temp sensor is saying, "the engine's all warmed up" but it may need a bit of extra fuel to get it to start. If you can get it to happen again, you might try blipping the throttle while you're cranking to manually add some extra fuel.
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| stugray |
Jul 28 2011, 04:37 PM
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#9
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
Sounds like vapor lock.
Once the fuel stops moving through the system it heats up and the pump wont re-prime. This is one of the reasons the factory moved the FP to the front and upgraded the fuel lines to handle the pressure. It also changes the pump from a "puller" to slightly more of a "pusher". Stu |
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| malaga_red75 |
Jul 28 2011, 04:38 PM
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#10
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'74 2.5L N/A Subie Group: Members Posts: 454 Joined: 5-March 06 From: Menlo Park, CA Member No.: 5,674 Region Association: None |
same thing happened on my 75 1.8L. It was the CHT (cylinder head temp) sensor. drove me nuts, but all better once fixed.
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| SLITS |
Jul 28 2011, 05:01 PM
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#11
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
Most common problem is the fuel pump ... not the fuel pump itself, but the check valve in it. D-Jet, L-Jet, CIS system are designed to hold 20 or so lbs of fuel pressure in the system for 10 - 20 minutes so the fuel does not boil in the pump. Pump doesn't like pumping vapor.
Hook a fuel pressure gauge into the system and see what happens to the fuel pressure on hot shutdown. If the pressure bleeds off rapidly, it's the check valve that has failed. |
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