# Starting problem on my 1996 Mercedes E320 **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [October 31, 2018, 5:26pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923 "2018-10-31T17:26:31Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Emir\_Berberovic](https://avatars.discourse-cdn.com/v4/letter/e/94ad74/32.png) [@Emir\_Berberovic](https://community.cartalk.com/u/Emir_Berberovic)\ **Post date:** [October 31, 2018, 5:26pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/1 "2018-10-31T17:26:31Z")
I have a issues with starting my 1996 mercedes E320 When its cold it starts right up, but when engine hot it will not start easy, it cranks good but i have to pump the gas pedal few times and then it will fire up. Any suggestions. Thanks. ---
**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\ **Post date:** [October 31, 2018, 5:42pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/2 "2018-10-31T17:42:45Z")
Could be a leaky injector causing flooding. Holding the gas pedal down all the way while cranking should clear that up within a few seconds if that’s the case. Good luck and please let us know. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 31, 2018, 5:45pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/3 "2018-10-31T17:45:28Z")
Have the fuel pressure tested. If the fuel system doesn’t hold residual fuel pressure when the engine is shut off when hot, the fuel in the fuel rails will boil causing vapor lock. Tester ---
**Author:** ![Emir\_Berberovic](https://avatars.discourse-cdn.com/v4/letter/e/94ad74/32.png) [@Emir\_Berberovic](https://community.cartalk.com/u/Emir_Berberovic)\ **Post date:** [October 31, 2018, 6:35pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/4 "2018-10-31T18:35:23Z")
So if it doesn’t hold the pressure, fuel pressure regulator gone bad? Thanks ---
**Author:** ![Emir\_Berberovic](https://avatars.discourse-cdn.com/v4/letter/e/94ad74/32.png) [@Emir\_Berberovic](https://community.cartalk.com/u/Emir_Berberovic)\ **Post date:** [October 31, 2018, 6:38pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/5 "2018-10-31T18:38:46Z")
So if it fires right up when hot with pedal down, dripping injector? I’ll try that , will let you know. Thanks. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 31, 2018, 6:39pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/6 "2018-10-31T18:39:06Z")
More than likely the anti drain-back check valve on the fuel pump is faulty. > **[Residual Pressure - CIS Flowtech](http://www.cisflowtech.com/frequently-asked-questions/testing-k-jet/residual-pressure/)** > > Residual pressure is very important for proper hot restart. What you are looking for here are leaks in the system. When you shut down the engine or fuel pump the system pressure will fall to 2.4 to 3.0 bar and stop. Pressure will slowly bleed off... Tester ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 31, 2018, 6:41pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/7 "2018-10-31T18:41:40Z")
If there were a leaking fuel injector, only one cylinder would not fire immediately. But the other cylinders would fire right up So that’s not it. Tester ---
**Author:** ![Emir\_Berberovic](https://avatars.discourse-cdn.com/v4/letter/e/94ad74/32.png) [@Emir\_Berberovic](https://community.cartalk.com/u/Emir_Berberovic)\ **Post date:** [October 31, 2018, 6:42pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/8 "2018-10-31T18:42:44Z")
Thank you. I’ll check that out ---
**Author:** ![Emir\_Berberovic](https://avatars.discourse-cdn.com/v4/letter/e/94ad74/32.png) [@Emir\_Berberovic](https://community.cartalk.com/u/Emir_Berberovic)\ **Post date:** [October 31, 2018, 9:48pm UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/9 "2018-10-31T21:48:11Z")
Holding pedal down didn’t help much, It usually works pumping the pedal while cranking. But when is cold engine no problem whatsoever. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [November 1, 2018, 3:18am UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/10 "2018-11-01T03:18:26Z")
A fuel pressure hold test would prove/disprove a leaky injector or fuel pump check valve problem. That’s probably the first thing to ask your shop to do. If the fuel pressure is correct & holds ok but it won’t start right up, other common heat-affected parts are the ignition module and the crank position sensor. Have you checked for engine diagnostic codes? There cold be some stored even if the check engine light is off. ---
**Author:** ![Emir\_Berberovic](https://avatars.discourse-cdn.com/v4/letter/e/94ad74/32.png) [@Emir\_Berberovic](https://community.cartalk.com/u/Emir_Berberovic)\ **Post date:** [November 1, 2018, 8:58am UTC](https://community.cartalk.com/t/starting-problem-on-my-1996-mercedes-e320/127923/11 "2018-11-01T08:58:42Z")
No codes , i’ve checked that, will try test fuel pressure and go from there. Thanks