 Under hard aceleration engine cuts out, Engine problems |
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| srozick |
 Feb 20 2016, 04:40 PM
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#1
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Newbie  Group: Members Posts: 7 Joined: 11-October 15 From: Pittsburgh Member No.: 19,254 Region Association: None  |
Hey, can you help.
We have a 73-914 1.7L. Under hard acceleration the engine cuts out and then we get a small back fire and the engine will catch. If we gradually accelerate the engine performs fine but is under hard acceleration that we have a problem. Can you possibly give us a direction to look to fix the problem. New fuel pump, new fuel filters,, and the tank was cleaned and lines flushed 200 miles ago. Thank for listening, |
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Replies(1 - 8)
| mgphoto |
Feb 20 2016, 04:46 PM
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#2
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"If there is a mistake it will find me" Group: Members Posts: 1,339 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
QUOTE(srozick @ Feb 20 2016, 02:40 PM)  Hey, can you help. We have a 73-914 1.7L. Under hard acceleration the engine cuts out and then we get a small back fire and the engine will catch. If we gradually accelerate the engine performs fine but is under hard acceleration that we have a problem. Can you possibly give us a direction to look to fix the problem. New fuel pump, new fuel filters,, and the tank was cleaned and lines flushed 200 miles ago. Thank for listening, Bad FI pressure regulator. |
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| TheCabinetmaker |
Feb 20 2016, 04:56 PM
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#3
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Check your fuel filter. It's starving for fuel at wot.
Check dwell, then timing, and adjust valves too if it's been a while. |
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| nordfisch |
Feb 20 2016, 05:15 PM
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#4
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Member Group: Members Posts: 86 Joined: 11-December 15 From: Germany Member No.: 19,451 Region Association: None |
QUOTE(mgphoto @ Feb 20 2016, 11:46 PM) Bad FI pressure regulator. No. This behavior is typical for missing additive injector pulses during acceleration. The throttle-valve-switch (TPS) switches contacts when opening the throttle and sends this information to the ECU. Check and clean this unit inside- do not oil or grease the contacts. The electrical current is very low, grease will prevent contacting. Look at this: https://oldtimer.tips/en/d-jetronic/58-throotleswitch Regards Norbert |
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| Series9 |
Feb 20 2016, 05:16 PM
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#5
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Lesbians taste like chicken. Group: Members Posts: 5,444 Joined: 22-August 04 From: DeLand, FL Member No.: 2,602 Region Association: South East States |
QUOTE(srozick @ Feb 20 2016, 05:40 PM) the tank was cleaned and lines flushed 200 miles ago. That statement says to me: Change the fuel filter. Anytime I clean a tank, I tell the customer to plan to change the fuel filter in 500 miles. |
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| srozick |
Feb 23 2016, 05:19 PM
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#6
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Newbie Group: Members Posts: 7 Joined: 11-October 15 From: Pittsburgh Member No.: 19,254 Region Association: None |
Thanks Joe. This will be the first thing that we do. and the cheapest.
QUOTE(Series9 @ Feb 20 2016, 03:16 PM) QUOTE(srozick @ Feb 20 2016, 05:40 PM) the tank was cleaned and lines flushed 200 miles ago. That statement says to me: Change the fuel filter. Anytime I clean a tank, I tell the customer to plan to change the fuel filter in 500 miles. |
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| srozick |
Feb 23 2016, 05:21 PM
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#7
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Newbie Group: Members Posts: 7 Joined: 11-October 15 From: Pittsburgh Member No.: 19,254 Region Association: None |
Thanks Norbert.
Fuel filters first and then the TPS rebuild. QUOTE(nordfisch @ Feb 20 2016, 03:15 PM) QUOTE(mgphoto @ Feb 20 2016, 11:46 PM) Bad FI pressure regulator. No. This behavior is typical for missing additive injector pulses during acceleration. The throttle-valve-switch (TPS) switches contacts when opening the throttle and sends this information to the ECU. Check and clean this unit inside- do not oil or grease the contacts. The electrical current is very low, grease will prevent contacting. Look at this: https://oldtimer.tips/en/d-jetronic/58-throotleswitch Regards Norbert |
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| TheCabinetmaker |
Feb 23 2016, 07:18 PM
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#8
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Guess you must have missed my post.
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| dflesburg |
Feb 24 2016, 10:58 AM
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#9
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Senior Member Group: Members Posts: 1,720 Joined: 6-April 04 From: Warm and Cheerful Centerville Ohio Member No.: 1,896 Region Association: None |
if it cuts out at 5800 it could be you have a rev limiting rotor.
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