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Old 10-04-2018, 01:58 PM
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Join Date: Oct 2018
Location: Trois-Rivières, Québec, Canada
Posts: 3
Default Extreme Throttle Lag

Hello All. I just bought a 2005 Volvo V70 2.5 N/A and It runs fine, except for a strange problem. When I step on the gas pedal, the car will start to accelerate for about half of a second, then go dead as if I just released the gas pedal for about 2 seconds and then runs fine again.

It does that at any given speed or rpm. If let's say I'm on the highway and need to pass a car, it will take the same time to start accelerating. When driving at a stable speed, the car runs fine.

I'm thinking it must be a throttle body related issue but I wonder if it's a common problem. I did a search on this forum and didn't find anything that looked like this.

The check engine light is on and I have 2 messages in the display control that states: Check Engine Block and another one that looks like it also.

I ordered an OBD reader online and should get it in 15 to 30 days so I'll probably know for sure by then.

But has anyone seen this issue?
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Old 10-09-2018, 01:15 PM
Join Date: Jul 2018
Posts: 73

Can't think of anything else that would cause this problem. The drive-by-wire system is prone to wear, commonly known as an issue, so it makes the most sense it would be the place to start. Especially since you have a warning light.

I'm also assuming that the car never actually dies or anything. It just doesn't accelerate as intended. If the engine stumbles and dies or runs rough, that is a different issue.
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Old Yesterday, 03:20 PM
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Join Date: Oct 2018
Location: Trois-Rivières, Québec, Canada
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Well I got my ELM 327 OBD reader for like 14$ on Amazon and got the codes out.

Besides some known issues (speed sensor fault, the speedometer reads the speed fine but the odometer and electronic speed reads 0), I also got a code that stated: Defective Intake Solenoid Valve actuator or something like that. I cleared the code and the car as been running fine ever since. I drove around 500 km and I'm waiting for the problem to come back but up to know the car is running like a charm.
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